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DISTRIBUTION
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|---|---|---|---|---|
| Cheiracanthium abbreviatum Simon, 1878 | It | Info | ||
| Roncus abditus (J.C. Chamberlin, 1930) | Sard | Info | ||
| Dysdera aberrans Gasparo, 2010 | It | Italian Endemic | Info | |
| Tapinocyba abetoneensis Wunderlich, 1980 | It | Italian Endemic | Info | |
| Saaristoa abnormis (Blackwall, 1841) | It | Info | ||
| Metaphalangium abruptum (Roewer, 1911) | Sic | Italian Endemic | Info | |
| Mangora acalypha (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Anyphaena accentuata (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Xysticus acerbus Thorell, 1872 | It / Sard / Sic | Info | ||
| Troglohyphantes achillis Isaia & Mammola, 2022 | It | Italian Endemic | Info | |
| Euophrys acripes (Simon, 1871) | It | Info | ||
| Alopecosa aculeata (Clerck, 1757) | It | Info | ||
| Entelecara acuminata (Wider, 1834) | It / Sard | Info | ||
| Walckenaeria acuminata Blackwall, 1833 | It | Info | ||
| Ischyropsalis adamii Canestrini, 1873 | It / Sard | Info | ||
| Hasarius adansoni (Audouin, 1826) | Sic | Introduced | Info | |
| Neoscona adianta (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Dysdera adriatica Kulczynski, 1897 | It | Endemic | Info | |
| Marinarozelotes adriaticus (Caporiacco, 1951) | It | Info | ||
| Clubiona aducta Simon, 1932 | It | Info | ||
| Tegenaria advena (C.L. Koch, 1841) | It | Info | ||
| Micaria aenea Thorell, 1871 | It | Info | ||
| Ephippiochthonius aeneae Gardini, 2013 | It | Italian Endemic | Info | |
| Zelotes aeneus (Simon, 1878) | It | Info | ||
| Heliophanus aeneus (Hahn, 1832) | It / Sic | Info | ||
| Pardosa aenigmatica Tongiorgi, 1966 | It | Info | ||
| Pseudomaro aenigmaticus Denis, 1966 | It | Info | ||
| Haplodrassus aenus Thaler, 1984 | It | Endemic | Info | |
| Harpactea aeoliensis Alicata, 1973 | Sic | Italian Endemic | Info | |
| Talavera aequipes (O. Pickard-Cambridge, 1871) | It / Sard / Sic | Info | ||
| Aelurillus aeruginosus (Simon, 1871) | Sic | Info | ||
| Entelecara aestiva Simon, 1918 | It | Info | ||
| Tiso aestivus (L. Koch, 1872) | It | Info | ||
| Allochernes aetnaeus Beier, 1975 | Sic | Italian Endemic | Info | |
| Roncus aetnensis Gardini & Rizzerio, 1987 | Sic | Italian Endemic | Info | |
| Atypus affinis Eichwald, 1830 | It | Info | ||
| Agyneta affinis (Kulczynski, 1898) | It | Info | ||
| Tapinocyba affinis Lessert, 1907 | It | Info | ||
| Trichoncus affinis Kulczynski, 1894 | It | Info | ||
| Nemesia africana (C.L. Koch, 1838) | It | Info | ||
| Calathocratus africanus (Lucas, 1847) | Sic | Info | ||
| Enoplognatha afrodite Hippa & Oksala, 1983 | It / Sard / Sic | Info | ||
| Chthonius agazzii Beier, 1966 | It | Italian Endemic | Info | |
| Acanthocreagris agazzii (Beier, 1966) | It | Italian Endemic | Info | |
| Gorbiscape agelenoides (Walckenaer, 1841) | It / Sic | Info | ||
| Piniphantes agnellus (Maurer & Thaler, 1988) | It | Endemic | Info | |
| Oedothorax agrestis (Blackwall, 1853) | It | Info | ||
| Pardosa agrestis (Westring, 1861) | It | Info | ||
| Eratigena agrestis (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Oedothorax agrestis longipes (Simon, 1884) | It | Info | ||
| Pardosa agricola (Thorell, 1856) | It / Sard | Info | ||
| Tenuiphantes alacris (Blackwall, 1853) | It | Info | ||
| Pardosa alacris (C.L. Koch, 1833) | It | Info | ||
| Gnaphosa alacris Simon, 1878 | It / Sard / Sic | Info | ||
| Pardosa albatula (Roewer, 1951) | It | Info | ||
| Drassodes albicans (Simon, 1878) | It | Info | ||
| Leptodrassus albidus Simon, 1914 | It / Sard / Sic | Info | ||
| Philodromus albidus Kulczynski, 1911 | It / Sic | Info | ||
| Aulonia albimana (Walckenaer, 1805) | It / Sard / Sic | Info | ||
| Bianor albobimaculatus (Lucas, 1846) | It / Sard / Sic | Info | ||
| Alopecosa albofasciata (Brullé, 1832) | It / Sard / Sic | Info | ||
| Anyphaena alboirrorata Simon, 1878 | It | Info | ||
| Steatoda albomaculata (De Geer, 1778) | It / Sard / Sic | Info | ||
| Nurscia albomaculata (Lucas, 1846) | It / Sard / Sic | Info | ||
| Poecilochroa albomaculata (Lucas, 1846) | It / Sard / Sic | Info | ||
| Eresus albopictus Simon, 1873 | Sic | Info | ||
| Troglohyphantes albopictus Pesarini, 1989 | It | Italian Endemic | Info | |
| Synageles albotrimaculatus (Lucas, 1846) | It / Sard / Sic | Info | ||
| Hypsosinga albovittata (Westring, 1851) | It / Sard / Sic | Info | ||
| Micaria albovittata (Lucas, 1846) | It / Sard | Info | ||
| Erigone aletris Crosby & Bishop, 1928 | It | Introduced | Info | |
| Zangherella algerica (Simon, 1895) | It | Info | ||
| Minniza algerica Beier, 1931 | Sic | Info | ||
| Cyclosa algerica Simon, 1885 | Sic | Info | ||
| Cyrba algerina (Lucas, 1846) | It / Sard / Sic | Info | ||
| Zodarion algiricum (Lucas, 1846) | It / Sic | Info | ||
| Episinus algiricus Lucas, 1846 | It / Sard / Sic | Info | ||
| Acanthocreagris alguerensis Gardini, 2018 | Sard | Italian Endemic | Info | |
| Harpactea alicatai Brignoli, 1979 | Sard | Italian Endemic | Info | |
| Aterigena aliquoi (Brignoli, 1971) | It / Sic | Italian Endemic | Info | |
| Alpiscorpius (Alpiscorpius) alpha (Caporiacco, 1950) | It | Endemic | Info | |
| Araniella alpica (L. Koch, 1869) | It / Sard | Info | ||
| Gnaphosa alpica Simon, 1878 | It | Info | ||
| Agyneta alpica Tanasevitch, 2000 | It | Endemic | Info | |
| Pelecopsis alpica Thaler, 1991 | It | Endemic | Info | |
| Linyphia alpicola van Helsdingen, 1969 | It | Info | ||
| Alopecosa alpicola (Simon, 1876) | It | Info | ||
| Clubiona alpicola Kulczynski, 1882 | It | Info | ||
| Chalcoscirtus alpicola (L. Koch, 1876) | It | Info | ||
| Chthonius alpicola Beier, 1951 | It | Info | ||
| Alopecosa alpicola soriculata (Simon, 1876) | It | Info | ||
| Scotinotylus alpigena (L. Koch, 1869) | It | Info | ||
| Arctosa alpigena (Doleschall, 1852) | It | Info | ||
| Micaria alpina L. Koch, 1872 | It | Info | ||
| Zora alpina Kulczynski, 1915 | It | Endemic | Info | |
| Platybunus alpinorelictus Martens, 1978 | It | Italian Endemic | Info | |
| Ischyropsalis alpinula Martens, 1978 | It | Italian Endemic | Info | |
| Mitostoma alpinum (Hadži, 1931) | It | Info | ||
| Robertus alpinus Dresco, 1959 | It | Italian Endemic | Info | |
| Diplocephalus alpinus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Coelotes alpinus Polenec, 1972 | It | Endemic | Info | |
| Xysticus alpinus Kulczynski, 1887 | It | Endemic | Info | |
| Micrargus alpinus Relys & Weiss, 1997 | It | Endemic | Info | |
| Roncus alpinus L. Koch, 1873 | It | Info | ||
| Araneus alsine (Walckenaer, 1802) | It / Sic | Info | ||
| Euscorpius altadonnai Tropea, 2017 | It / Sic | Italian Endemic | Info | |
| Ephippiochthonius altamurae Gardini, 2013 | It | Italian Endemic | Info | |
| Mecopisthes alter Thaler, 1991 | It | Italian Endemic | Info | |
| Bolyphantes alticeps (Sundevall, 1833) | It | Info | ||
| Walckenaeria alticeps (Denis, 1952) | It | Info | ||
| Araeoncus altissimus Simon, 1884 | It / Sic | Info | ||
| Palliduphantes alutacius (Simon, 1884) | It | Info | ||
| Prodidomus amaranthinus (Lucas, 1846) | Sic | Info | ||
| Trichoncus ambrosii Wunderlich, 2011 | It | Endemic | Info | |
| Pardosa amentata (Clerck, 1757) | It | Info | ||
| Archaeodictyna ammophila (Menge, 1871) | It | Info | ||
| Pselaphochernes anachoreta (E. Simon, 1878) | It / Sard | Info | ||
| Dysdera ancora Grasshoff, 1959 | Sard / Sic | Italian Endemic | Info | |
| Dysdera andreinii Caporiacco, 1928 | It | Italian Endemic | Info | |
| Parachtes andreinii Alicata, 1966 | It | Italian Endemic | Info | |
| Clubiona andreinii Caporiacco, 1936 | It | Italian Endemic | Info | |
| Roncus andreinii (Caporiacco, 1925) | It | Italian Endemic | Info | |
| Walckenaeria angelica Millidge, 1979 | It | Italian Endemic | Info | |
| Typhlonesticus angelicus Isaia & Ribera, 2023 | It | Endemic | Info | |
| Araeoncus anguineus (L. Koch, 1869) | It | Info | ||
| Episinus angulatus (Blackwall, 1836) | It / Sic | Info | ||
| Araneus angulatus Clerck, 1757 | It / Sic | Info | ||
| Cheiracanthium angulitarse Simon, 1878 | It / Sard / Sic | Info | ||
| Cybaeus angustiarum L. Koch, 1868 | It | Info | ||
| Palliduphantes angustiformis (Simon, 1884) | It / Sard | Endemic | Info | |
| Echemus angustifrons (Westring, 1861) | It / Sic | Info | ||
| Gyas annulatus (Olivier, 1791) | It | Info | ||
| Agroeca annulipes Simon, 1878 | Sard | Info | ||
| Mitostoma anophthalmum (Fage, 1946) | It | Italian Endemic | Info | |
| Inermocoelotes anoplus (Kulczynski, 1897) | It | Info | ||
| Scotinotylus antennatus (O. Pickard-Cambridge, 1875) | It | Info | ||
| Walckenaeria antica (Wider, 1834) | It / Sard | Info | ||
| Palliduphantes antroniensis (Schenkel, 1933) | It | Info | ||
| Roncus antrorum (Simon, 1896) | It | Italian Endemic | Info | |
| Harpactocrates apennicola Simon, 1914 | It | Italian Endemic | Info | |
| Nemesia apenninica Decae, Pantini & Isaia, 2015 | It | Italian Endemic | Info | |
| Dysdera apenninica apenninica Alicata, 1964 | It | Italian Endemic | Info | |
| Dysdera apenninica aprutiana Alicata, 1964 | It | Italian Endemic | Info | |
| Leiobunum apenninicum (Martens, 1969) | It | Info | ||
| Troglohyphantes apenninicus Isaia, Mammola & Pantini, 2017 | It | Italian Endemic | Info | |
| Talavera aperta (Miller, 1971) | It | Info | ||
| Sisicus apertus (Holm, 1939) | It | Info | ||
| Micrargus apertus (O. Pickard-Cambridge, 1871) | It | Info | ||
| Ero aphana (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Heliophanus apiatus Simon, 1868 | It / Sard / Sic | Info | ||
| Oedothorax apicatus (Blackwall, 1850) | It | Info | ||
| Ceratinella apollonii Caporiacco, 1938 | It | Info | ||
| Bathyphantes approximatus (O. Pickard-Cambridge, 1871) | It | Info | ||
| Zelotes apricorum (L. Koch, 1876) | It / Sic | Info | ||
| Xysticus apricus L. Koch, 1876 | It | Info | ||
| Neobisium (Neobisium) apuanicum Callaini, 1981 | It | Italian Endemic | Info | |
| Dicranolasma apuanum Marcellino, 1971 | It | Italian Endemic | Info | |
| Zangherella apuliae (Caporiacco, 1949) | It | Info | ||
| Microctenonyx apuliae (Caporiacco, 1951) | It | Info | ||
| Acanthocreagris apulica Callaini, 1986 | It | Italian Endemic | Info | |
| Ephippiochthonius apulicus (Beier, 1958) | It | Italian Endemic | Info | |
| Argyroneta aquatica (Clerck, 1757) | It | Info | ||
| Euscorpius aquilejensis (C.L. Koch, 1837) | It | Info | ||
| Lathys arabs Simon, 1910 | Sic | Info | ||
| Nemesia arboricola Pocock, 1903 | Sic | Info | ||
| Centromerus arcanus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Pellenes arciger (Walckenaer, 1837) | It / Sard | Info | ||
| Erigone arctica (White, 1852) | It | Info | ||
| Evarcha arcuata (Clerck, 1757) | It / Sic | Info | ||
| Thanatus arenarius L. Koch, 1872 | It | Info | ||
| Palliduphantes arenicola (Denis, 1964) | It | Info | ||
| Eratigena arganoi (Brignoli, 1971) | It | Italian Endemic | Info | |
| Dysdera arganoi Gasparo, 2004 | It | Italian Endemic | Info | |
| Olios argelasius (Walckenaer, 1806) | It / Sard / Sic | Info | ||
| Dasylobus argentatus argentatus (Canestrini, 1872) | Sard | Info | ||
| Dasylobus argentatus cavipalpis Gruber, 1965 | It / Sic | Italian Endemic | Info | |
| Histricostoma argenteolunulatum (Canestrini, 1875) | It / Sard / Sic | Info | ||
| Zelotes argoliensis (C.L. Koch, 1839) | It | Info | ||
| Harpactea arguta (Simon, 1907) | It | Endemic | Info | |
| Argyrodes argyrodes (Walckenaer, 1841) | It / Sard / Sic | Info | ||
| Mansuphantes aridus (Thorell, 1875) | It | Endemic | Info | |
| Agyneta arietans (O. Pickard-Cambridge, 1873) | It | Info | ||
| Mastigusa arietina (Thorell, 1871) | It | Info | ||
| Ballus armadillo (Simon, 1871) | It / Sard / Sic | Info | ||
| Mughiphantes armatus (Kulczynski, 1905) | It | Endemic | Info | |
| Megabunus armatus (Kulczynski, 1887) | It | Info | ||
| Aculepeira armida (Audouin, 1826) | It / Sard / Sic | Info | ||
| Tegenaria armigera Simon, 1873 | Sard | Endemic | Info | |
| Zora armillata Simon, 1878 | It | Info | ||
| Diplocephalus arnoi Isaia, 2005 | It | Italian Endemic | Info | |
| Dictyna arundinacea (Linnaeus, 1758) | It / Sard / Sic | Info | ||
| Robertus arundineti (O. Pickard-Cambridge, 1871) | It / Sard / Sic | Info | ||
| Metopobactrus ascitus (Kulczynski, 1894) | It | Info | ||
| Theridion asopi Vanuytven, 2014 | It | Info | ||
| Rhode aspinifera (Nikolic, 1963) | It | Endemic | Info | |
| Aterigena aspromontensis Bolzern, Haenggi & Burckhardt, 2010 | It | Italian Endemic | Info | |
| Roncus assimilis Beier, 1931 | It | Italian Endemic | Info | |
| Nemesia asterix Decae & Huber, 2017 | Sard | Italian Endemic | Info | |
| Ozyptila atomaria (Panzer, 1801) | It / Sard / Sic | Info | ||
| Pardosa atomaria (C.L. Koch, 1847) | It | Info | ||
| Erigone atra Blackwall, 1833 | It | Info | ||
| Thanatus atratus Simon, 1875 | It | Info | ||
| Zygiella atrica (C.L. Koch, 1845) | It / Sard | Info | ||
| Eratigena atrica (C.L. Koch, 1843) | It | Info | ||
| Attulus atricapillus (Simon, 1882) | It / Sic | Info | ||
| Zelotes atrocaeruleus (Simon, 1878) | It / Sic | Info | ||
| Coelotes atropos (Walckenaer, 1830) | It | Info | ||
| Walckenaeria atrotibialis (O. Pickard-Cambridge, 1878) | It | Info | ||
| Xysticus audax (Schrank, 1803) | It / Sard / Sic | Info | ||
| Rilaena augusti Chemini, 1986 | It | Italian Endemic | Info | |
| Kochiura aulica (C.L. Koch, 1838) | It / Sard / Sic | Info | ||
| Amilenus aurantiacus (Simon, 1881) | It | Info | ||
| Trichoncus aurantiipes Simon, 1884 | Sard / Sic | Info | ||
| Heliophanus auratus C.L. Koch, 1835 | It / Sard / Sic | Info | ||
| Philodromus aureolus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Trichoncus auritus (L. Koch, 1869) | It | Info | ||
| Sibianor aurocinctus (Ohlert, 1865) | It | Info | ||
| Mansuphantes auruncus (Brignoli, 1979) | It | Italian Endemic | Info | |
| Singa aussereri Thorell, 1873 | It / Sard | Info | ||
| Altella aussereri Thaler, 1990 | It | Info | ||
| Nomisia aussereri (L. Koch, 1872) | It / Sard / Sic | Info | ||
| Styloctetor austerus (L. Koch, 1884) | It | Endemic | Info | |
| Eukoenenia austriaca austriaca Hansen, 1926 | It | Info | ||
| Eukoenenia austriaca peregrina Condè, 1990 | It | Info | ||
| Eukoenenia austriaca stinyi Strouhal, 1936 | It | Info | ||
| Erigone autumnalis Emerton, 1882 | It | Introduced | Info | |
| Caracladus avicula (L. Koch, 1869) | It | Info | ||
| Cybaeodes avolensis Platnick & Di Franco, 1992 | Sic | Italian Endemic | Info | |
| Protoleptoneta baccettii (Brignoli, 1979) | It | Italian Endemic | Info | |
| Roncus baccettii Lazzeroni, 1969 | Sard | Italian Endemic | Info | |
| Gnaphosa badia (L. Koch, 1866) | It | Info | ||
| Pseudicius badius (Simon, 1868) | It / Sic | Info | ||
| Mughiphantes baebleri (Lessert, 1910) | It | Endemic | Info | |
| Zelotes balcanicus Deltshev, 2006 | It | Info | ||
| Dysdera baratellii Pesarini, 2001 | It | Italian Endemic | Info | |
| Lessertia barbara (Simon, 1884) | Sic | Info | ||
| Marinarozelotes barbatus (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Saitis barbipes (Simon, 1868) | It / Sard | Info | ||
| Alopecosa barbipes (Sundevall, 1833) | It | Info | ||
| Marinarozelotes bardiae (Caporiacco, 1928) | Sic | Info | ||
| Gnaphosa basilicata Simon, 1882 | It | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) battonii Beier, 1966 | It | Italian Endemic | Info | |
| Spermophorides baunei Wunderlich, 1995 | Sard | Italian Endemic | Info | |
| Segestria bavarica C.L. Koch, 1843 | It / Sard / Sic | Info | ||
| Garypus beauvoisi (Audouin, 1826) | It / Sard / Sic | Info | ||
| Lycosa bedeli Simon, 1876 | Sic | Info | ||
| Spelyngochthonius beieri Gardini, 1994 | Sard | Italian Endemic | Info | |
| Roncus beieri Caporiacco, 1947 | It | Italian Endemic | Info | |
| Rugathodes bellicosus (Simon, 1873) | It | Info | ||
| Roncus belluatii Gardini, 1992 | It | Italian Endemic | Info | |
| Megabunus bergomas Chemini, 1985 | It | Italian Endemic | Info | |
| Eukoenenia berlesei berlesei Silvestri, 1903 | It / Sard | Endemic | Info | |
| Neobisium (Neobisium) bernardi gennargentui Callaini, 1983 | Sard | Italian Endemic | Info | |
| Astrobunus bernardinus Simon, 1879 | It | Info | ||
| Occidenchthonius berninii (Callaini, 1983) | Sard | Info | ||
| Leptorchestes berolinensis (C.L. Koch, 1846) | It | Info | ||
| Alpiscorpius (Alpiscorpius) beta (Caporiacco, 1950) | It | Endemic | Info | |
| Theridion betteni Wiehle, 1960 | It | Info | ||
| Centromerita bicolor (Blackwall, 1833) | It | Info | ||
| Marilynia bicolor (Simon, 1870) | It / Sard / Sic | Info | ||
| Gnaphosa bicolor (Hahn, 1833) | It / Sard | Info | ||
| Misumena bicolor Simon, 1875 | Sard | Info | ||
| Diplocentria bidentata (Emerton, 1882) | It | Info | ||
| Nemastoma bidentatum bidentatum Roewer, 1914 | It | Info | ||
| Pardosa bifasciata (C.L. Koch, 1834) | It | Info | ||
| Xysticus bifasciatus C.L. Koch, 1837 | It / Sard | Info | ||
| Dismodicus bifrons (Blackwall, 1841) | It | Info | ||
| Gonatium biimpressum Simon, 1884 | It / Sard | Endemic | Info | |
| Neottiura bimaculata bimaculata (Linnaeus, 1767) | It / Sard / Sic | Info | ||
| Neottiura bimaculata pellucida (Simon, 1873) | It | Info | ||
| Zelotes bimaculatus (C.L. Koch, 1837) | It | Info | ||
| Roncus binaghii Gardini, 1991 | It | Info | ||
| Thyreosthenius biovatus (O. Pickard-Cambridge, 1875) | It | Info | ||
| Steatoda bipunctata (Linnaeus, 1758) | It / Sic | Info | ||
| Rhode biscutata Simon, 1893 | It | Info | ||
| Pulchellodromus bistigma (Simon, 1870) | It / Sard / Sic | Info | ||
| Gibbaranea bituberculata (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Hypomma bituberculatum (Wider, 1834) | It | Info | ||
| Altella biuncata (Miller, 1949) | It / Sard | Info | ||
| Menemerus bivittatus (Dufour, 1831) | It | Info | ||
| Sardinidion blackwalli (O. Pickard-Cambridge, 1871) | It / Sard / Sic | Info | ||
| Cozyptila blackwalli (Simon, 1875) | It / Sard / Sic | Info | ||
| Scotophaeus blackwalli blackwalli (Thorell, 1871) | It / Sard / Sic | Info | ||
| Scotophaeus blackwalli isabellinus (Simon, 1873) | It | Info | ||
| Philodromus blanckei (Wunderlich, 1995) | It / Sard | Endemic | Info | |
| Mioxena blanda (Simon, 1884) | It | Info | ||
| Pardosa blanda (C.L. Koch, 1833) | It | Info | ||
| Bassaniodes bliteus (Simon, 1875) | It / Sard | Info | ||
| Theridion boesenbergi Strand, 1904 | It | Info | ||
| Tetragnatha bogotensis Keyserling, 1865 | Sard | Introduced | Info | |
| Ephippiochthonius boldorii (Beier, 1934) | It | Info | ||
| Balkanoroncus boldorii (Beier, 1931) | It | Italian Endemic | Info | |
| Troglohyphantes bolognai Brignoli, 1975 | It | Italian Endemic | Info | |
| Eukoenenia bonadonai Condé, 1979 | It | Info | ||
| Centromerus bonaeviae Brignoli, 1979 | Sard | Italian Endemic | Info | |
| Silometopus bonessi Casemir, 1970 | It | Info | ||
| Psammitis bonneti (Denis, 1938) | It | Info | ||
| Heser bonneti (Marinaro, 1967) | Sic | Info | ||
| Troglohyphantes bornensis Isaia & Pantini, 2008 | It | Italian Endemic | Info | |
| Philodromus bosmansi Muster & Thaler, 2004 | Sard | Info | ||
| Nemesia bosmansi Decae, 2024 | It | Italian Endemic | Info | |
| Dysdera bottazziae Caporiacco, 1951 | It | Endemic | Info | |
| Meta bourneti Simon, 1922 | It / Sard / Sic | Info | ||
| Dipoena braccata (C.L. Koch, 1841) | It / Sic | Info | ||
| Phaeocedus braccatus (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Asthenargus bracianus Miller, 1938 | It | Info | ||
| Silometopus braunianus Thaler, 1978 | It | Endemic | Info | |
| Phlegra bresnieri (Lucas, 1846) | It / Sard / Sic | Info | ||
| Chalcoscirtus brevicymbialis Wunderlich, 1980 | It | Info | ||
| Cteniza brevidens (Doleschall, 1871) | Sard / Sic | Info | ||
| Emblyna brevidens (Kulczynski, 1897) | It / Sic | Info | ||
| Xysticus brevidentatus Wunderlich, 1995 | It | Info | ||
| Centromerus brevipalpus (Menge, 1866) | It | Info | ||
| Ceratinella brevipes (Westring, 1851) | It | Info | ||
| Clubiona brevipes Blackwall, 1841 | It / Sic | Info | ||
| Ozyptila brevipes (Hahn, 1826) | It / Sard | Info | ||
| Zimirina brevipes Pérez & Blasco, 1986 | Sard | Info | ||
| Dicranopalpus brevipes Marcellino, 1970 | Sic | Italian Endemic | Info | |
| Ceratinella brevis (Wider, 1834) | It | Info | ||
| Pellenes brevis (Simon, 1868) | It / Sic | Info | ||
| Dicymbium brevisetosum Locket, 1962 | It | Info | ||
| Dysdera brignoliana Gasparo, 2000 | It | Italian Endemic | Info | |
| Cryphoeca brignolii Thaler, 1980 | It | Endemic | Info | |
| Ariadna brignolii Wunderlich, 2011 | It / Sard / Sic | Italian Endemic | Info | |
| Eukoenenia brignolii Condé, 1979 | It | Info | ||
| Anelasmocephalus brignolii Martens & Chemini, 1988 | Sard | Italian Endemic | Info | |
| Mecynargus brocchus (L. Koch, 1872) | It | Endemic | Info | |
| Argiope bruennichi (Scopoli, 1772) | It / Sard / Sic | Info | ||
| Agroeca brunnea (Blackwall, 1833) | It | Info | ||
| Mughiphantes brunneri (Thaler, 1984) | It | Italian Endemic | Info | |
| Floronia bucculenta (Clerck, 1757) | It | Info | ||
| Pelecopsis bucephala (O. Pickard-Cambridge, 1875) | Sard / Sic | Info | ||
| Platybunus bucephalus (C. L. Koch, 1835) | It | Info | ||
| Philodromus buchari Kubcova, 2004 | It / Sard | Info | ||
| Homalenotus buchneri (Schenkel, 1936) | It | Info | ||
| Bassaniodes bufo (Dufour, 1820) | It / Sard / Sic | Info | ||
| Philodromus buxi Simon, 1884 | It / Sard | Info | ||
| Neoscona byzanthina (Pavesi, 1876) | It / Sard / Sic | Info | ||
| Palliduphantes byzantinus (Fage, 1931) | It | Info | ||
| Nemesia caementaria (Latreille, 1799) | It / Sard / Sic | Info | ||
| Clubiona caerulescens L. Koch, 1867 | It | Info | ||
| Euscorpius (Euscorpius) calabriae Caporiacco, 1950 | It | Italian Endemic | Info | |
| Zelotes calactinus Di Franco, 1989 | Sic | Italian Endemic | Info | |
| Anelasmocephalus calcaneatus Martens & Chemini, 1988 | Sic | Italian Endemic | Info | |
| Troglohyphantes caligatus Pesarini, 1989 | It | Endemic | Info | |
| Zelotes callidus (Simon, 1878) | It / Sard / Sic | Info | ||
| Macrothele calpeiana (Walckenaer, 1805) | It / Sard | Info | ||
| Ero cambridgei Kulczynski, 1911 | It / Sard | Info | ||
| Porrhomma cambridgei Merrett, 1994 | It | Info | ||
| Anelasmocephalus cambridgei (Westwood, 1874) | It | Info | ||
| Porrhomma campbelli F.O. Pickard-Cambridge, 1894 | It | Info | ||
| Cheiracanthium campestre Lohmander, 1944 | It | Info | ||
| Tegenaria campestris (C.L. Koch, 1834) | It / Sard | Info | ||
| Drassodes canaglensis Caporiacco, 1927 | It | Italian Endemic | Info | |
| Chelifer cancroides (Linné, 1758) | It / Sard | Info | ||
| Minicia candida Denis, 1946 | It | Info | ||
| Iberina candida (Simon, 1875) | It / Sard | Info | ||
| Mogrus canescens (C.L. Koch, 1846) | It | Info | ||
| Dasumia canestrinii (L. Koch, 1876) | It | Info | ||
| Mendoza canestrinii (Ninni, 1868) | It / Sard / Sic | Info | ||
| Euscorpius (Euscorpius) canestrinii (Fanzago, 1872) | Sard | Italian Endemic | Info | |
| Opilio canestrinii (Thorell, 1876) | It / Sic | Info | ||
| Chthonius caoduroi Callaini, 1987 | It | Italian Endemic | Info | |
| Bassaniodes caperatus (Simon, 1875) | It / Sard | Info | ||
| Walckenaeria capito (Westring, 1861) | It | Info | ||
| Tegenaria capolongoi Brignoli, 1977 | It | Italian Endemic | Info | |
| Troglohyphantes caporiaccoi Brignoli, 1971 | It | Italian Endemic | Info | |
| Zodarion caporiaccoi Roewer, 1942 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) caporiaccoi Heurtault-Rossi, 1966 | It | Italian Endemic | Info | |
| Erigone capra Simon, 1884 | It | Info | ||
| Chthonius caprai Gardini, 1977 | It / Sard / Sic | Italian Endemic | Info | |
| Roncus caprai Gardini, 1993 | It | Italian Endemic | Info | |
| Zelotes caprearum (Pavesi, 1875) | It | Italian Endemic | Info | |
| Centromerus capucinus (Simon, 1884) | It | Info | ||
| Roncus caralitanus Gardini, 1981 | Sard | Italian Endemic | Info | |
| Aculepeira carbonaria (L. Koch, 1869) | It | Info | ||
| Neobisium (Neobisium) carcinoides carcinoides (Hermann, 1804) | It / Sard / Sic | Italian Endemic | Info | |
| Enoplognatha caricis (Fickert, 1876) | It | Info | ||
| Attulus caricis (Westring, 1861) | It | Info | ||
| Carinostoma carinatum (Roewer, 1914) | It | Info | ||
| Chthonius carinthiacus Beier, 1951 | It | Info | ||
| Sciastes carli (Lessert, 1907) | It | Endemic | Info | |
| Ischyropsalis carli Lessert, 1905 | It | Info | ||
| Setaphis carmeli (O. Pickard-Cambridge, 1872) | It / Sard / Sic | Info | ||
| Nemesia carminans (Latreille, 1818) | It | Info | ||
| Kaemis carnicus Gasparo, 1995 | It | Italian Endemic | Info | |
| Mughiphantes carnicus (van Helsdingen, 1982) | It | Italian Endemic | Info | |
| Macrargus carpenteri (O. Pickard-Cambridge, 1895) | It | Info | ||
| Harpactea carusoi Alicata, 1974 | Sic | Info | ||
| Palliduphantes carusoi (Brignoli, 1979) | Sic | Italian Endemic | Info | |
| Roncus carusoi Gardini & Rizzerio, 1987 | Sic | Italian Endemic | Info | |
| Occidenchthonius cassolai (Beier, 1973) | Sard | Italian Endemic | Info | |
| Roncus cassolai Beier, 1973 | Sard | Italian Endemic | Info | |
| Steatoda castanea (Clerck, 1757) | It | Info | ||
| Monocephalus castaneipes (Simon, 1884) | It | Info | ||
| Phintella castriesiana (Grube, 1861) | It / Sic | Info | ||
| Civizelotes caucasius (L. Koch, 1866) | It | Info | ||
| Textrix caudata L. Koch, 1872 | It / Sard / Sic | Info | ||
| Holocnemus caudatus (Dufour, 1820) | Sic | Info | ||
| Agyneta cauta (O. Pickard-Cambridge, 1903) | It | Info | ||
| Troglohyphantes cavadinii Pesarini, 1989 | It | Italian Endemic | Info | |
| Pardosa cavannae Simon, 1881 | It | Italian Endemic | Info | |
| Dasylobus cavannae Simon, 1882 | It | Italian Endemic | Info | |
| Centromerus cavernarum (L. Koch, 1872) | It | Info | ||
| Chthonius cavernarum Ellingsen, 1909 | It | Info | ||
| Nemesia cecconii Kulczynski, 1907 | It | Italian Endemic | Info | |
| Scotina celans (Blackwall, 1841) | It / Sard / Sic | Info | ||
| Euscorpius (Euscorpius) celanus Tropea, 2012 | It | Italian Endemic | Info | |
| Oecobius cellariorum (Dugès, 1836) | It | Info | ||
| Nemesia cellicola Audouin, 1826 | It / Sic | Info | ||
| Nesticus cellulanus (Clerck, 1757) | It | Info | ||
| Centetostoma centetes (Simon, 1881) | It | Info | ||
| Dysdera centroitalica Gasparo, 1997 | It | Italian Endemic | Info | |
| Aculepeira ceropegia (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Neobisium (Ommatoblothrus) cerrutii Beier, 1955 | It | Italian Endemic | Info | |
| Neaetha cerussata (Simon, 1868) | Sic | Info | ||
| Philodromus cespitum (Walckenaer, 1802) | It / Sic | Info | ||
| Ballus chalybeius (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Neobisium (Neobisium) chironomum (L. Koch, 1873) | It | Italian Endemic | Info | |
| Tetragnatha chrysochlora (Audouin, 1826) | Info | |||
| Mitostoma chrysomelas (Hermann, 1804) | It | Info | ||
| Philaeus chrysops (Poda, 1761) | It / Sard / Sic | Info | ||
| Lamprochernes chyzeri (Tömösváry, 1882) | It | Info | ||
| Cicurina cicur (Fabricius, 1793) | It | Info | ||
| Chernes cimicoides (Fabricius, 1793) | It / Sard / Sic | Info | ||
| Aphantaulax cincta (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Pardosa cincta (Kulczynski, 1887) | It | Info | ||
| Arctosa cinerea (Fabricius, 1777) | It / Sard / Sic | Info | ||
| Phlegra cinereofasciata (Simon, 1868) | It | Info | ||
| Theridion cinereum Thorell, 1875 | It | Info | ||
| Salticus cingulatus (Panzer, 1797) | It / Sard | Info | ||
| Kaemis circe (Brignoli, 1975) | It | Italian Endemic | Info | |
| Araneus circe (Audouin, 1826) | It / Sic | Info | ||
| Tegenaria circeoensis Bolzern, Burckhardt & Hänggi, 2013 | It | Italian Endemic | Info | |
| Metaphalangium cirtanum (C .L. Koch, 1839) | It / Sard / Sic | Info | ||
| Trogulus cisalpinus Chemini & Martens, 1988 | It | Info | ||
| Trichopterna cito (O. Pickard-Cambridge, 1873) | It | Info | ||
| Cyrtophora citricola (Forsskål, 1775) | It / Sard / Sic | Info | ||
| Brigittea civica (Lucas, 1850) | It / Sard / Sic | Info | ||
| Civizelotes civicus (Simon, 1878) | It / Sic | Info | ||
| Turinyphia clairi (Simon, 1884) | It | Endemic | Info | |
| Neriene clathrata (Sundevall, 1830) | It / Sard / Sic | Info | ||
| Callobius claustrarius (Hahn, 1833) | It | Info | ||
| Scotinotylus clavatus (Schenkel, 1927) | It | Endemic | Info | |
| Ozyptila claveata (Walckenaer, 1837) | It | Info | ||
| Walckenaeria clavicornis (Emerton, 1882) | It | Info | ||
| Pachygnatha clercki Sundevall, 1823 | It / Sard | Info | ||
| Zelotes clivicola (L. Koch, 1870) | It | Info | ||
| Trogulus closanicus Avram, 1971 | It | Info | ||
| Lycosoides coarctata (Dufour, 1831) | It / Sard / Sic | Info | ||
| Micaria coarctata (Lucas, 1846) | It / Sard / Sic | Info | ||
| Haplodrassus cognatus (Westring, 1861) | It | Info | ||
| Megalepthyphantes collinus (L. Koch, 1872) | It / Sic | Info | ||
| Philodromus collinus C.L. Koch, 1835 | It | Info | ||
| Thanatus coloradensis Keyserling, 1880 | It | Info | ||
| Troglohyphantes comottii Pesarini, 1989 | It | Italian Endemic | Info | |
| Chthonius comottii Inzaghi, 1987 | It | E | Info | |
| Styloctetor compar (Westring, 1861) | It | Info | ||
| Improphantes complicatus (Emerton, 1882) | It | Info | ||
| Clubiona comta C.L. Koch, 1839 | It / Sard | Info | ||
| Haplodrassus concertor (Simon, 1878) | It | Info | ||
| Ephippiochthonius concii (Beier, 1953) | It / Sic | Info | ||
| Centromerita concinna (Thorell, 1875) | It | Info | ||
| Euscorpius (Euscorpius) concinnus (C.L. Koch, 1837) | It | Italian Endemic | Info | |
| Diplostyla concolor (Wider, 1834) | It / Sard / Sic | Info | ||
| Ozyptila confluens (C.L. Koch, 1845) | It / Sard / Sic | Info | ||
| Zodarion confusum Denis, 1935 | It | Italian Endemic | Info | |
| Icius congener (Simon, 1871) | It / Sard / Sic | Info | ||
| Entelecara congenera (O. Pickard-Cambridge, 1879) | It | Info | ||
| Cyclosa conica (Pallas, 1772) | It / Sard / Sic | Info | ||
| Agyneta conigera (O. Pickard-Cambridge, 1863) | It | Info | ||
| Salticus conjonctus (Simon, 1868) | It / Sard | Info | ||
| Palliduphantes conradini (Brignoli, 1971) | It | Italian Endemic | Info | |
| Archaeodictyna consecuta (O. Pickard-Cambridge, 1872) | It | Info | ||
| Stemonyphantes conspersus (L. Koch, 1879) | It | Info | ||
| Kishidaia conspicua (L. Koch, 1866) | It | Info | ||
| Kishidaia conspicua concolor Caporiacco, 1951 | It | Info | ||
| Allochernes contarinii Callaini, 1991 | It | Italian Endemic | Info | |
| Lasaeola convexa (Blackwall, 1870) | It / Sard / Sic | Info | ||
| Porrhomma convexum (Westring, 1851) | It / Sard | Info | ||
| Xysticus cor Canestrini, 1873 | It / Sard | Info | ||
| Lasaeola coracina (C.L. Koch, 1837) | It / Sard | Info | ||
| Rhacochelifer corcyrensis corcyrensis (Beier, 1930) | It | Info | ||
| Trogulus coriziformis C. L. Koch, 1839 | It | Italian Endemic | Info | |
| Walckenaeria corniculans (O. Pickard-Cambridge, 1875) | It / Sard / Sic | Info | ||
| Sintula corniger (Blackwall, 1856) | It | Info | ||
| Theonina cornix (Simon, 1881) | It / Sard | Info | ||
| Hypomma cornutum (Blackwall, 1833) | It | Info | ||
| Mughiphantes cornutus (Schenkel, 1927) | It | Info | ||
| Larinioides cornutus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Hybocoptus corrugis (O. Pickard-Cambridge, 1875) | Sard | Info | ||
| Tapinocyba corsica (Simon, 1884) | It | Endemic | Info | |
| Phrurolithus corsicus (Simon, 1878) | Sard | Info | ||
| Harpactea corticalis (Simon, 1882) | It | Info | ||
| Clubiona corticalis (Walckenaer, 1802) | It / Sic | Info | ||
| Gnaphosa corticola Simon, 1914 | It | Info | ||
| Centromerus cottarellii Brignoli, 1979 | It | Italian Endemic | Info | |
| Araeoncus crassiceps (Westring, 1861) | It | Info | ||
| Diplocephalus crassilobus (Simon, 1884) | It | Info | ||
| Amaurobius crassipalpis Canestrini & Pavesi, 1870 | It | Endemic | Info | |
| Haplodrassus crassipes (Lucas, 1846) | Sic | Info | ||
| Pardosa cribrata Simon, 1876 | It / Sard | Info | ||
| Dysdera cribrata Simon, 1882 | It | Endemic | Info | |
| Bassaniodes cribratus (Simon, 1885) | It | Info | ||
| Zelotes criniger Denis, 1937 | It / Sic | Info | ||
| Zachaeus crista (Brullé, 1832) | It | Info | ||
| Erigone cristatopalpus Simon, 1884 | It | Info | ||
| Dicranolasma cristatum Thorell, 1876 | It | Italian Endemic | Info | |
| Diplocephalus cristatus (Blackwall, 1833) | It | Info | ||
| Tenuiphantes cristatus (Menge, 1866) | It | Info | ||
| Trematocephalus cristatus (Wider, 1834) | It | Info | ||
| Xysticus cristatus (Clerck, 1757) | It / Sard | Info | ||
| Trogulus cristatus Simon, 1879 | It | Info | ||
| Dysdera crocata C.L. Koch, 1838 | It / Sard / Sic | Info | ||
| Centrophantes crosbyi (Fage & Kratochvíl, 1933) | It | Info | ||
| Incestophantes crucifer (Menge, 1866) | It / Sard | Info | ||
| Leptoneta crypticola crypticola Simon, 1907 | It | Endemic | Info | |
| Leptoneta crypticola franciscoloi Caporiacco, 1950 | It | Italian Endemic | Info | |
| Megabunus cryptobergomas Muster & Wachter, 2015 | It | Italian Endemic | Info | |
| Walckenaeria cucullata (C.L. Koch, 1836) | It | Info | ||
| Araniella cucurbitina (Clerck, 1757) | It / Sard / Sic | Info | ||
| Palliduphantes culicinus (Simon, 1884) | It | Info | ||
| Domitius culsu Ballarin, 2020 | It | Italian Endemic | Info | |
| Alopecosa cuneata (Clerck, 1757) | It / Sic | Info | ||
| Agroeca cuprea Menge, 1873 | It | Info | ||
| Heliophanus cupreus (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Heliophanus cupreus globifer (Simon, 1868) | It | Info | ||
| Alopecosa cursor (Hahn, 1831) | It / Sic | Info | ||
| Walckenaeria cuspidata Blackwall, 1833 | It | Info | ||
| Zelotes cyanescens Simon, 1914 | It | Info | ||
| Micaria cyrnea Brignoli, 1983 | It / Sard | Info | ||
| Dendrochernes cyrneus cyrneus (L. Koch, 1873) | It / Sic | Info | ||
| Mitostoma daccordii Tedeschi & Sciaky 1997 | It | Italian Endemic | Info | |
| Roncus dallaii Callaini, 1979 | Sard | Italian Endemic | Info | |
| Haplodrassus dalmatensis (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Tegenaria dalmatica Kulczynski, 1906 | It / Sard / Sic | Info | ||
| Synageles dalmaticus (Keyserling, 1863) | It / Sic | Info | ||
| Heliophanus dampfi Schenkel, 1923 | It | Info | ||
| Tetragnatha dearmata Thorell, 1873 | It | Info | ||
| Improphantes decolor (Westring, 1861) | It | Info | ||
| Porrhoclubiona decora (Blackwall, 1859) | It | Info | ||
| Heliophanus decoratus L. Koch, 1875 | Sic | Info | ||
| Pachygnatha degeeri Sundevall, 1830 | It / Sard / Sic | Info | ||
| Chthonius delmastroi Gardini, 2009 | It | Endemic | Info | |
| Pimoa delphinica Mammola, Hormiga & Isaia, 2016 | It | Italian Endemic | Info | |
| Troglohyphantes delphinicus Isaia & Mammola, 2022 | It | Italian Endemic | Info | |
| Alpiscorpius (Alpiscorpius) delta Kovařík, Štundlová, Fet & Šťáhlavský, 2019 | It | Italian Endemic | Info | |
| Chthonius densedentatus Beier, 1938 | It / Sic | Info | ||
| Palliduphantes dentatidens (Simon, 1929) | It | Info | ||
| Civizelotes dentatidens (Simon, 1914) | It / Sard | Info | ||
| Gnathonarium dentatum (Wider, 1834) | It / Sard / Sic | Info | ||
| Diplocephalus dentatus Tullgren, 1955 | It | Info | ||
| Lessertia dentichelis (Simon, 1884) | It / Sard | Info | ||
| Textrix denticulata (Olivier, 1789) | It / Sard | Info | ||
| Mermessus denticulatus (Banks, 1898) | It | Introduced | Info | |
| Metaplatybunus denticulatus Marcellino, 1972 | Sic | Italian Endemic | Info | |
| Lacinius dentiger (C. L. Koch, 1847) | It | Info | ||
| Erigone dentigera O. Pickard-Cambridge, 1874 | It | Introduced | Info | |
| Agroeca dentigera Kulczynski, 1913 | It | Info | ||
| Euryopis dentigera Simon, 1880 | It | Info | ||
| Nemastoma dentigerum Canestrini, 1873 | It | Info | ||
| Histricostoma dentipalpe (Ausserer, 1867) | It | Info | ||
| Erigone dentipalpis (Wider, 1834) | It / Sard / Sic | Info | ||
| Ischyropsalis dentipalpis Canestrini, 1872 | It | Info | ||
| Coriarachne depressa (C.L. Koch, 1837) | It | Info | ||
| Metasclerosoma depressum (Canestrini, 1872) | It | Italian Endemic | Info | |
| Minniza deserticola Simon, 1885 | It / Sic | Info | ||
| Xysticus desidiosus Simon, 1875 | It | Info | ||
| Centromerus desmeti Bosmans, 1986 | It | Info | ||
| Zelotes devotus Grimm, 1982 | It | Endemic | Info | |
| Spelyngochthonius dewaelei Gardini, 2008 | Sard | Italian Endemic | Info | |
| Araneus diadematus Clerck, 1757 | It / Sard / Sic | Info | ||
| Saloca diceros (O. Pickard-Cambridge, 1871) | It | Info | ||
| Iberina difficilis (Harm, 1966) | It | Info | ||
| Drassodes difficilis (Simon, 1878) | It | Endemic | Info | |
| Euophrys difficilis (Simon, 1868) | It / Sic | Info | ||
| Typhochrestus digitatus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Pelecopsis digitulus Bosmans & Abrous, 1992 | It | Info | ||
| Garypinus dimidiatus (L. Koch, 1873) | Sic | Info | ||
| Opilio dinaricus Šilhavý, 1938 | It | Info | ||
| Porrhoclubiona diniensis (Simon, 1878) | It | Info | ||
| Zilla diodia (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Dasumia diomedea Caporiacco, 1947 | It | Italian Endemic | Info | |
| Leptodrassus diomedeus Caporiacco, 1951 | It | Italian Endemic | Info | |
| Araeoncus discedens (Simon, 1881) | It | Info | ||
| Tapinopa disjugata Simon, 1884 | Sard | Info | ||
| Rhacochelifer disjunctus (L. Koch, 1873) | It | Info | ||
| Philodromus dispar Walckenaer, 1826 | It / Sard / Sic | Info | ||
| Araniella displicata (Hentz, 1847) | It | Info | ||
| Collinsia distincta (Simon, 1884) | It | Info | ||
| Neobisium (Neobisium) distinctum (Beier, 1928) | It | Info | ||
| Attulus distinguendus (Simon, 1868) | It | Info | ||
| Clubiona diversa O. Pickard-Cambridge, 1862 | It | Info | ||
| Xysticus diversus (Blackwall, 1870) | Sic | Info | ||
| Micaria dives (Lucas, 1846) | It / Sic | Info | ||
| Neobisium (Neobisium) doderoi (E. Simon, 1896) | It / Sard / Sic | Info | ||
| Chthonius doderoi doderoi Beier, 1930 | It | Info | ||
| Amblyocarenum doleschalli (Ausserer, 1871) | It / Sic | Info | ||
| Neobisium (Neobisium) dolicodactylum dolicodactylum (Canestrini, 1874) | It | Info | ||
| Amblyolpium dollfusi Simon, 1898 | It / Sard / Sic | Info | ||
| Neobisium (Neobisium) dolomiticum Beier, 1952 | It | Info | ||
| Gnaphosa dolosa Herman, 1879 | It / Sic | Info | ||
| Tegenaria domestica (Clerck, 1757) | It / Sard / Sic | Info | ||
| Oonops domesticus Dalmas, 1916 | It | Info | ||
| Troglohyphantes dominici Pesarini, 1988 | It | Italian Endemic | Info | |
| Troglochthonius doratodactylus Helversen, 1968 | It | E | Info | |
| Scotolemon doriae Pavesi, 1878 | It / Sard / Sic | Info | ||
| Nelima doriae (Canestrini, 1872) | It / Sard / Sic | Info | ||
| Xysticus doriai (Dalmas, 1922) | It / Sic | Info | ||
| Diaea dorsata (Fabricius, 1777) | It / Sard / Sic | Info | ||
| Harpactocrates drassoides (Simon, 1882) | It | Endemic | Info | |
| Drassodex drescoi Hervé, Roberts & Murphy, 2009 | It | Endemic | Info | |
| Paidiscura dromedaria (Simon, 1880) | It | Info | ||
| Nemesia dubia O. Pickard-Cambridge, 1874 | It | Info | ||
| Heliophanus dubius C.L. Koch, 1835 | It / Sic | Info | ||
| Pselaphochernes dubius (O. P.-Cambridge, 1892) | It | Info | ||
| Eusparassus dufouri Simon, 1932 | It / Sic | Info | ||
| Siwa dufouri (Simon, 1874) | Sard / Sic | Info | ||
| Euryopis duodecimguttata Caporiacco, 1950 | It / Sic | Italian Endemic | Info | |
| Uroctea durandi (Latreille, 1809) | It / Sard / Sic | Info | ||
| Cyphophthalmus duricorius (Joseph, 1868) | It | Info | ||
| Walckenaeria dysderoides (Wider, 1834) | It | Info | ||
| Attulus dzieduszyckii (L. Koch, 1870) | It | Info | ||
| Gongylidiellum edentatum Miller, 1951 | It | Info | ||
| Porrhomma egeria Simon, 1884 | It / Sic | Info | ||
| Zelotes egregioides Senglet, 2011 | Sic | Info | ||
| Zelotes egregius Simon, 1914 | It / Sard / Sic | Info | ||
| Nemesia eleanora O. Pickard-Cambridge, 1873 | It | Info | ||
| Zelotes electus (C.L. Koch, 1839) | It / Sic | Info | ||
| Antistea elegans (Blackwall, 1841) | It | Info | ||
| Cheiracanthium elegans Thorell, 1875 | It | Info | ||
| Zodarion elegans (Simon, 1873) | It / Sard / Sic | Info | ||
| Ozyptila elegans (Blackwall, 1870) | It | Info | ||
| Silometopus elegans (O. Pickard-Cambridge, 1873) | It / Sic | Info | ||
| Palliduphantes eleonorae (Wunderlich, 1995) | Sard | Italian Endemic | Info | |
| Tegenaria eleonorae Brignoli, 1974 | Sard | Italian Endemic | Info | |
| Spermophorides elevata (Simon, 1873) | It / Sard / Sic | Info | ||
| Dismodicus elevatus (C.L. Koch, 1838) | It | Info | ||
| Chthonius ellingseni Beier, 1939 | It | Info | ||
| Pelecopsis elongata (Wider, 1834) | It / Sard | Info | ||
| Chthonius elongatus Lazzeroni, 1970 | It | Italian Endemic | Info | |
| Ephippiochthonius elymus Gardini, 2013 | Sic | Italian Endemic | Info | |
| Zodarion emarginatum (Simon, 1873) | Sard | Info | ||
| Philodromus emarginatus (Schrank, 1803) | It / Sard / Sic | Info | ||
| Pelecopsis eminula (Simon, 1884) | It | Info | ||
| Neriene emphana (Walckenaer, 1841) | It | Info | ||
| Pseudicius encarpatus (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Heliophanus encifer Simon, 1871 | It | Info | ||
| Gonatium ensipotens (Simon, 1881) | It | Info | ||
| Lipocrea epeiroides (O. Pickard-Cambridge, 1872) | Sard / Sic | Info | ||
| Lacinius ephippiatus (C. L. Koch, 1835) | It | Info | ||
| Afraflacilla epiblemoides (Chyzer, 1891) | It | Info | ||
| Euryopis episinoides (Walckenaer, 1847) | It / Sard / Sic | Info | ||
| Heliophanus equester L. Koch, 1867 | It / Sic | Info | ||
| Agyneta equestris (L. Koch, 1881) | It | Info | ||
| Amaurobius erberi (Keyserling, 1863) | It / Sard / Sic | Info | ||
| Zelotes erebeus (Thorell, 1871) | It | Info | ||
| Kryptonesticus eremita (Simon, 1880) | It / Sard / Sic | Info | ||
| Porrhomma errans (Blackwall, 1841) | It | Info | ||
| Pseudeuophrys erratica (Walckenaer, 1826) | It / Sard | Info | ||
| Cheiracanthium erraticum (Walckenaer, 1802) | It / Sic | Info | ||
| Xysticus erraticus (Blackwall, 1834) | It / Sard | Info | ||
| Dysdera erythrina (Walckenaer, 1802) | It / Sic | Info | ||
| Walckenaeria erythrina (Simon, 1884) | Sic | Info | ||
| Neobisium (Neobisium) erythrodactylum (L. Koch, 1873) | It | Info | ||
| Dipoena erythropus (Simon, 1881) | It | Info | ||
| Entelecara erythropus (Westring, 1851) | It / Sic | Info | ||
| Alopecosa etrusca Lugetti & Tongiorgi, 1969 | It | Info | ||
| Ephippiochthonius etruscus Gardini, 2013 | It | Italian Endemic | Info | |
| Chthonius euganeus Gardini, 1991 | It | Italian Endemic | Info | |
| Camillina europaea Dalmas, 1922 | It | Italian Endemic | Info | |
| Ariadna europaensis Wunderlich, 2011 | It | Info | ||
| Scotinotylus evansi (O. Pickard-Cambridge, 1894) | It | Info | ||
| Troglohyphantes excavatus Fage, 1919 | It | Endemic | Info | |
| Nomisia excerpta (O. Pickard-Cambridge, 1872) | It / Sard | Info | ||
| Hilaira excisa (O. Pickard-Cambridge, 1871) | It / Sic | Info | ||
| Zelotes exiguus (Müller & Schenkel, 1895) | It | Info | ||
| Nomisia exornata (C.L. Koch, 1839) | It / Sard / Sic | Info | ||
| Tallusia experta (O. Pickard-Cambridge, 1871) | It | Info | ||
| Agnyphantes expunctus (O. Pickard-Cambridge, 1875) | It | Info | ||
| Tetragnatha extensa (Linnaeus, 1758) | It / Sard / Sic | Info | ||
| Troglohyphantes exul Thaler, 1987 | It | Italian Endemic | Info | |
| Mitostoma fabianae Tedeschi & Sciaky 1997 | It | Italian Endemic | Info | |
| Alopecosa fabrilis fabrilis (Clerck, 1757) | It / Sard / Sic | Info | ||
| Alopecosa fabrilis trinacriae Lugetti & Tongiorgi, 1969 | Sic | Info | ||
| Scotophaeus fabrisae Caporiacco, 1950 | It | Italian Endemic | Info | |
| Kryptonesticus fagei (Kratochvíl, 1933) | It | Info | ||
| Troglohyphantes fagei Roewer, 1931 | It | Endemic | Info | |
| Panamomops fagei Miller & Kratochvil, 1939 | It | Info | ||
| Evarcha falcata (Clerck, 1757) | It / Sard / Sic | Info | ||
| Brommella falcigera (Balogh, 1935) | It | Info | ||
| Trogulus falcipenis Komposch, 2000 | It | Info | ||
| Rhysodromus fallax (Sundevall, 1833) | It | Info | ||
| Menemerus falsificus Simon, 1868 | It | Info | ||
| Dactylochelifer falsus (Beier, 1930) | Sard / Sic | Info | ||
| Theridion familiare O. Pickard-Cambridge, 1871 | It / Sard | Info | ||
| Tegenaria faniapollinis Brignoli, 1978 | Sic | Info | ||
| Alopecosa farinosa (Herman, 1879) | It / Sard / Sic | Info | ||
| Phlegra fasciata (Hahn, 1826) | It / Sic | Info | ||
| Troglohyphantes fatalis Pesarini, 1988 | It | Italian Endemic | Info | |
| Semljicola faustus (O. Pickard-Cambridge, 1901) | It | Info | ||
| Zelotes femellus (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Leptodrassus femineus (Simon, 1873) | It / Sard / Sic | Info | ||
| Pardosa femoralis Simon, 1876 | It | Info | ||
| Tegenaria femoralis Simon, 1873 | It | Endemic | Info | |
| Amaurobius fenestralis (Ström, 1768) | It / Sard / Sic | Info | ||
| Amaurobius ferox (Walckenaer, 1830) | It / Sard | Info | ||
| Pardosa ferruginea (L. Koch, 1870) | It | Info | ||
| Tegenaria ferruginea (Panzer, 1804) | It | Info | ||
| Xysticus ferrugineus Menge, 1876 | It | Info | ||
| Nemesia fertoni Simon, 1914 | Sard | Endemic | Info | |
| Apocheiridium ferum (E. Simon, 1879) | It / Sard | Info | ||
| Phrurolithus festivus (C.L. Koch, 1835) | It / Sic | Info | ||
| Asianellus festivus (C.L. Koch, 1834) | It / Sard | Info | ||
| Arctosa figurata (Simon, 1876) | It | Info | ||
| Dolomedes fimbriatus (Clerck, 1757) | It | Info | ||
| Histopona fioni Bolzern, Pantini & Isaia, 2013 | It | Endemic | Info | |
| Saaristoa firma (O. Pickard-Cambridge, 1906) | It | Info | ||
| Thanatus firmetorum Muster & Thaler, 2003 | It | Endemic | Info | |
| Neobisium (Neobisium) fiscelli Callaini, 1983 | It | Italian Endemic | Info | |
| Dysdera flagellata Grasshoff, 1959 | Sic | Italian Endemic | Info | |
| Dysdera flagellifera aeoliensis Alicata, 1973 | Sic | Italian Endemic | Info | |
| Dysdera flagellifera flagellifera Caporiacco, 1947 | It | Italian Endemic | Info | |
| Ero flammeola Simon, 1881 | It / Sard | Info | ||
| Nigma flavescens (Walckenaer, 1830) | It / Sic | Info | ||
| Tetratrichobothrius flavicaudis cereris (Bonacina & Rivellini, 1986) | It | Italian Endemic | Info | |
| Tetratrichobothrius flavicaudis flavicaudis (De Geer, 1778) | It / Sard | Info | ||
| Titanoeca flavicoma L. Koch, 1872 | It | Info | ||
| Macaroeris flavicomis (Simon, 1885) | Sard | Info | ||
| Hyptiotes flavidus (Blackwall, 1862) | It / Sard | Info | ||
| Tenuiphantes flavipes (Blackwall, 1854) | It / Sard | Info | ||
| Heliophanus flavipes (Hahn, 1832) | It / Sard / Sic | Info | ||
| Liophrurillus flavitarsis (Lucas, 1846) | It / Sard | Info | ||
| Euryopis flavomaculata (C.L. Koch, 1836) | It | Info | ||
| Lycosoides flavomaculata Lucas, 1846 | Sic | Info | ||
| Segestria florentina (Rossi, 1790) | It / Sard / Sic | Info | ||
| Palliduphantes florentinus (Caporiacco, 1947) | It | Italian Endemic | Info | |
| Phrurolithus florentinus Caporiacco, 1923 | It | Italian Endemic | Info | |
| Attulus floricola (C.L. Koch, 1837) | It | Info | ||
| Acanthocreagris focarilei Gardini, 1998 | It | Italian Endemic | Info | |
| Acanthocreagris foghesa Gardini, 2018 | Sard | Italian Endemic | Info | |
| Micaria formicaria (Sundevall, 1831) | It / Sic | Info | ||
| Myrmarachne formicaria (De Geer, 1778) | It / Sard / Sic | Info | ||
| Thanatus formicinus (Clerck, 1757) | It / Sard | Info | ||
| Micrommata formosa Pavesi, 1878 | Sic | Info | ||
| Erigonoplus foveatus (Dahl, 1912) | It | Info | ||
| Mansuphantes fragilis (Thorell, 1875) | It | Info | ||
| Enoplognatha franzi Wunderlich, 1995 | Sic | Info | ||
| Holoscotolemon franzinii Tedeschi & Sciaky, 1994 | It | Italian Endemic | Info | |
| Porrhomma frasassianum Weiss & Sarbu, 2021 | It | Italian Endemic | Info | |
| Zodarion frenatum Simon, 1885 | It | Info | ||
| Incestophantes frigidus (Simon, 1884) | It | Endemic | Info | |
| Euophrys frontalis (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Mogrus frontosus (Simon, 1871) | Sard | Endemic | Info | |
| Frontinellina frutetorum (C.L. Koch, 1835) | It / Sard / Sic | Info | ||
| Clubiona frutetorum L. Koch, 1867 | It | Info | ||
| Eratigena fuesslini (Pavesi, 1873) | It / Sic | Info | ||
| Drassodes fugax (Simon, 1878) | It | Info | ||
| Micaria fulgens (Walckenaer, 1802) | It | Info | ||
| Zelotes fulvaster (Simon, 1878) | It | Info | ||
| Phlegra fulvastra (Simon, 1868) | Sic | Info | ||
| Pardosa fulvipes (Collett, 1876) | It | Info | ||
| Dendryphantes fulviventris (Lucas, 1846) | Sic | Info | ||
| Arctosa fulvolineata (Lucas, 1846) | It / Sard / Sic | Info | ||
| Cheiracanthium fulvotestaceum Simon, 1878 | It | Info | ||
| Hypomma fulvum (Bösenberg, 1902) | It | Info | ||
| Micaria funerea Simon, 1878 | It | Info | ||
| Ero furcata (Villers, 1789) | It | Info | ||
| Poecilochroa furcata Simon, 1914 | It / Sic | Info | ||
| Walckenaeria furcillata (Menge, 1869) | It | Info | ||
| Ozyptila furcula L. Koch, 1882 | Sard | Info | ||
| Theridion furfuraceum Simon, 1914 | It | Info | ||
| Neriene furtiva (O. Pickard-Cambridge, 1871) | It / Sard | Info | ||
| Segestria fusca Simon, 1882 | It | Info | ||
| Neobisium (Neobisium) fuscimanum (C.L. Koch, 1843) | It | Info | ||
| Ephippiochthonius fuscimanus (Simon, 1900) | It | Info | ||
| Agyneta fuscipalpus (C.L. Koch, 1836) | It | Info | ||
| Monocephalus fuscipes (Blackwall, 1836) | It | Info | ||
| Marinarozelotes fuscipes (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Philodromus fuscolimbatus Lucas, 1846 | It / Sard | Info | ||
| Philodromus fuscomarginatus (De Geer, 1778) | It | Info | ||
| Zelotes fuscorufus (Simon, 1878) | It / Sard / Sic | Info | ||
| Oedothorax fuscus (Blackwall, 1834) | It | Info | ||
| Apostenus fuscus Westring, 1851 | It | Info | ||
| Dysdera fustigans Alicata, 1966 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) galeatum Beier, 1953 | It | Info | ||
| Chthonius gallettii Gardini, 2021 | Sic | Italian Endemic | Info | |
| Zodarion gallicum (Simon, 1873) | It / Sard | Info | ||
| Maso gallicus Simon, 1894 | It / Sard | Info | ||
| Zelotes gallicus Simon, 1914 | It | Info | ||
| Xysticus gallicus Simon, 1875 | It | Info | ||
| Eukoenenia gallii Christian, 2009 | It | Info | ||
| Ephippiochthonius gallii Gardini, 2013 | It | Info | ||
| Euophrys gambosa (Simon, 1868) | It / Sard / Sic | Info | ||
| Alpiscorpius (Balkanscorpius) gamma (Caporiacco, 1950) | It | Endemic | Info | |
| Cybaeodes gardinii Trotta, 2024 | Sard | Italian Endemic | Info | |
| Euscorpius (Euscorpius) garganicus garganicus Caporiacco, 1950 | It | Endemic | Info | |
| Euscorpius (Euscorpius) garganicus molisanus Tropea, 2017 | It | Italian Endemic | Info | |
| Pireneitega garibaldii (Kritscher, 1969) | It / Sic | Italian Endemic | Info | |
| Kaemis gasparoi Mazzoleni & Pantini, 2018 | It | Italian Endemic | Info | |
| Eukoenenia gasparoi Condé, 1988 | It | Info | ||
| Dicranopalpus gasteinensis Doleschall, 1852 | It | Info | ||
| Centromerus gatoi Ballarin & Pantini, 2020 | It | Italian Endemic | Info | |
| Pseudomogrus gavdos (Logunov & Marusik, 2003) | Sard | Info | ||
| Pardosa gefsana Roewer, 1959 | Sard / Sic | Info | ||
| Enoplognatha gemina Bosmans & Van Keer, 1999 | Sard | Info | ||
| Theridiosoma gemmosum (L. Koch, 1877) | It | Info | ||
| Porrhoclubiona genevensis (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Pellenes geniculatus (Simon, 1868) | It / Sard / Sic | Info | ||
| Theridion genistae Simon, 1873 | It / Sard | Info | ||
| Harpactea gennargentu Wunderlich, 1995 | Sard | Italian Endemic | Info | |
| Chthonius gentianae Gardini, 2021 | It | Italian Endemic | Info | |
| Anatolidion gentile (Simon, 1881) | It / Sic | Info | ||
| Ephippiochthonius genuensis (Gardini, 1990) | It | Italian Endemic | Info | |
| Micrargus georgescuae Millidge, 1976 | It | Info | ||
| Clubiona germanica Thorell, 1871 | It | Info | ||
| Zodarion germanicum (C.L. Koch, 1837) | It | Info | ||
| Alpiscorpius (Alpiscorpius) germanus (C.L. Koch, 1837) | It | Endemic | Info | |
| Troglohyphantes gestroi Fage, 1933 | It | Italian Endemic | Info | |
| Dasylobus gestroi (Thorell, 1876) | Sard | Info | ||
| Ephippiochthonius gestroi (Simon, 1896) | It | Italian Endemic | Info | |
| Roncus gestroi Beier, 1930 | It | Italian Endemic | Info | |
| Troglohyphantes giachinoi Isaia & Mammola, 2018 | It | Italian Endemic | Info | |
| Oedothorax gibbifer (Kulczynski, 1882) | It | Info | ||
| Gibbaranea gibbosa (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Oedothorax gibbosus (Blackwall, 1841) | It | Info | ||
| Palpimanus gibbulus Dufour, 1820 | It / Sard / Sic | Info | ||
| Pholcomma gibbum (Westring, 1851) | It / Sard / Sic | Info | ||
| Pardosa giebeli (Pavesi, 1873) | It | Endemic | Info | |
| Liocranum giersbergi Kraus, 1955 | Sard | Italian Endemic | Info | |
| Hadoblothrus gigas (Caporiacco, 1951) | It | Italian Endemic | Info | |
| Uloborus gilvus (Blackwall, 1870) | It | Info | ||
| Euryopis giordanii Caporiacco, 1950 | It | Italian Endemic | Info | |
| Oreonetides glacialis (L. Koch, 1872) | It | Info | ||
| Mitopus glacialis (Heer, 1845 ) | It | Info | ||
| Palliduphantes gladiola (Simon, 1884) | It | Info | ||
| Pulchellodromus glaucinus (Simon, 1870) | It / Sard / Sic | Info | ||
| Globochthonius globifer (Simon, 1879) | It | Info | ||
| Erigonoplus globipes (L. Koch, 1872) | It | Info | ||
| Synema globosum (Fabricius, 1775) | It / Sard / Sic | Info | ||
| Theridula gonygaster (Simon, 1873) | It | Introduced | Info | |
| Xysticus gortanii Caporiacco, 1922 | It | Info | ||
| Allagelena gracilens (C.L. Koch, 1841) | It / Sard / Sic | Info | ||
| Bathyphantes gracilis (Blackwall, 1841) | It / Sard | Info | ||
| Syedra gracilis (Menge, 1869) | It | Info | ||
| Civizelotes gracilis (Canestrini, 1868) | It | Info | ||
| Zodarion gracilitibiale Denis, 1934 | It | Info | ||
| Cinetata gradata (Simon, 1881) | It | Info | ||
| Habrocestum graecum Dalmas, 1920 | It | Info | ||
| Diplocephalus graecus (O. Pickard-Cambridge, 1873) | It / Sard / Sic | Info | ||
| Bassaniodes graecus (C.L. Koch, 1837) | It / Sard | Info | ||
| Trogulus graecus Dahl, 1903 | It | Info | ||
| Eukoenenia graffitii Condé & Heurtault, 1994 | Sard | Italian Endemic | Info | |
| Ephippiochthonius grafittii (Gardini, 1981) | Sard | Italian Endemic | Info | |
| Spelyngochthonius grafittii Gardini, 1994 | Sard | Italian Endemic | Info | |
| Roncus grafittii Gardini, 1982 | Sard | Italian Endemic | Info | |
| Xysticus grallator Simon, 1932 | It / Sard | Info | ||
| Hylyphantes graminicola (Sundevall, 1830) | It | Info | ||
| Runcinia grammica (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Dasylobus graniferus (Canestrini, 1872) | It / Sic | Info | ||
| Dysdera granulata Kulczynski, 1897 | It | Endemic | Info | |
| Odiellus granulatus (Canestrini, 1872) | It | Info | ||
| Trogloneta granulum Simon, 1922 | It | Info | ||
| Pimoa graphitica Mammola, Hormiga & Isaia, 2016 | It | Endemic | Info | |
| Harpactea gridellii (Caporiacco, 1951) | It / Sic | Italian Endemic | Info | |
| Harpactea grisea (Canestrini, 1868) | It | Endemic | Info | |
| Steatoda grossa (C.L. Koch, 1838) | It / Sard / Sic | Introduced | Info | |
| Araneus grossus (C.L. Koch, 1844) | It | Info | ||
| Acanthocreagris grottoloi Gardini, 2018 | It | Italian Endemic | Info | |
| Chthonius guglielmii Callaini, 1986 | It | Info | ||
| Diplocephalus guidoi Frick & Isaia, 2012 | It | Italian Endemic | Info | |
| Agyneta gulosa (L. Koch, 1869) | It | Info | ||
| Crustulina guttata (Wider, 1834) | It / Sic | Info | ||
| Trichoncus hackmani Millidge, 1955 | It | Info | ||
| Anelasmocephalus hadzii Martens, 1978 | It | Info | ||
| Chernes hahnii (C.L. Koch, 1839) | It | Info | ||
| Chthonius halberti Kew, 1916 | It / Sard / Sic | Info | ||
| Singa hamata (Clerck, 1757) | It / Sard | Info | ||
| Singa hamata melanocephala C.L. Koch, 1836 | It | Info | ||
| Zodarion hamatum Wiehle, 1964 | It | Endemic | Info | |
| Icius hamatus (C.L. Koch, 1846) | It / Sard / Sic | Info | ||
| Mughiphantes handschini (Schenkel, 1919) | It | Endemic | Info | |
| Theridion hannoniae Denis, 1945 | It / Sard | Info | ||
| Centromerus hanseni Ballarin & Pantini, 2020 | It | Italian Endemic | Info | |
| Tegenaria hasperi Chyzer, 1897 | It / Sic | Info | ||
| Dendryphantes hastatus (Clerck, 1757) | It / Sard | Info | ||
| Nemesia hastensis Decae, Pantini & Isaia, 2015 | It | Italian Endemic | Info | |
| Drassodex heeri (Pavesi, 1873) | It | Endemic | Info | |
| Diplocephalus helleri (L. Koch, 1869) | It | Info | ||
| Astrobunus helleri (Ausserer, 1867) | It | Info | ||
| Ischyropsalis hellwigii hellwigii (Panzer, 1794) | It | Info | ||
| Hahnia helveola Simon, 1875 | It | Info | ||
| Asthenargus helveticus Schenkel, 1936 | It | Info | ||
| Trichoncus helveticus Denis, 1965 | It / Sic | Info | ||
| Cryptodrassus helvolus (O. Pickard-Cambridge, 1872) | Sic | Info | ||
| Theridion hemerobium Simon, 1914 | It | Info | ||
| Tegenaria henroti Dresco, 1956 | Sard | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) henroti Beier, 1956 | Sard | Italian Endemic | Info | |
| Tenuiphantes herbicola (Simon, 1884) | It / Sard / Sic | Info | ||
| Neottiura herbigrada (Simon, 1873) | It / Sard | Info | ||
| Euophrys herbigrada (Simon, 1871) | It / Sard / Sic | Info | ||
| Micrargus herbigradus (Blackwall, 1854) | It | Info | ||
| Hypsosinga heri (Hahn, 1831) | It / Sic | Info | ||
| Zelotes hermani (Chyzer, 1897) | It | Info | ||
| Chthonius herminii Gardini, 2021 | It | Italian Endemic | Info | |
| Cheirochelifer heterometrus (L. Koch, 1873) | Sard | Info | ||
| Lathys heterophthalma Kulczynski, 1891 | It | Info | ||
| Oxyopes heterophthalmus (Latreille, 1804) | It / Sard / Sic | Info | ||
| Robertus heydemanni Wiehle, 1965 | It | Info | ||
| Gonatium hilare (Thorell, 1875) | It / Sic | Info | ||
| Clubiona hilaris Simon, 1878 | It | Info | ||
| Synageles hilarulus (C.L. Koch, 1846) | It | Info | ||
| Lasiargus hirsutus (Menge, 1869) | It | Info | ||
| Dicranolasma hirtum Loman, 1894 | It | Italian Endemic | Info | |
| Zelotes hirtus (Thorell, 1875) | It | Info | ||
| Heriaeus hirtus (Latreille, 1819) | It / Sard / Sic | Info | ||
| Trochosa hispanica Simon, 1870 | It / Sard | Info | ||
| Microcreagrina hispanica (Ellingsen, 1910) | Sard / Sic | Info | ||
| Drassodex hispanus (L. Koch, 1866) | It / Sard | Info | ||
| Withius hispanus (L. Koch, 1873) | It / Sard / Sic | Info | ||
| Rhysodromus histrio (Latreille, 1819) | It / Sard / Sic | Info | ||
| Theridion histrionicum Thorell, 1875 | It | Info | ||
| Marinarozelotes holosericeus (Simon, 1878) | It | Info | ||
| Harpactea hombergi (Scopoli, 1763) | It / Sic | Info | ||
| Lacinius horridus (Panzer, 1794) | It / Sard / Sic | Info | ||
| Chthonius horridus Beier, 1934 | It | Italian Endemic | Info | |
| Linyphia hortensis Sundevall, 1830 | It / Sard | Info | ||
| Pardosa hortensis (Thorell, 1872) | It / Sard | Info | ||
| Nigma hortensis (Simon, 1870) | It | Info | ||
| Marinarozelotes huberti (Platnick & Murphy, 1984) | It / Sard | Info | ||
| Araeoncus humilis (Blackwall, 1841) | It / Sard / Sic | Info | ||
| Lathys humilis (Blackwall, 1855) | It / Sard | Info | ||
| Cryptodrassus hungaricus (Balogh, 1935) | It | Info | ||
| Euscorpius hyblaeus Tropea, 2016 | Sic | Italian Endemic | Info | |
| Piratula hygrophila (Thorell, 1872) | It | Info | ||
| Drassodex hypocrita (Simon, 1878) | It / Sard | Info | ||
| Xysticus ibex Simon, 1875 | It / Sard | Info | ||
| Brachythele icterica (C.L. Koch, 1838) | It | Info | ||
| Typhlonesticus idriacus (Roewer, 1931) | It | Endemic | Info | |
| Mughiphantes ignavus Simon, 1884 | It | Endemic | Info | |
| Erigonella ignobilis (O. Pickard-Cambridge, 1871) | It | Info | ||
| Nemesia ilvae Caporiacco, 1950 | It | Italian Endemic | Info | |
| Chthonius ilvensis Beier, 1963 | It | E | Info | |
| Saitis imitatus (Simon, 1868) | It | Info | ||
| Thyene imperialis (Rossi, 1846) | It / Sard / Sic | Info | ||
| Microlinyphia impigra (O. Pickard-Cambridge, 1871) | It | Info | ||
| Phylloneta impressa (L. Koch, 1881) | It / Sard / Sic | Info | ||
| Improphantes improbulus (Simon, 1929) | It | Info | ||
| Parachtes inaequipes (Simon, 1882) | Sard | Endemic | Info | |
| Neobisium (Neobisium) incertum J.C. Chamberlin, 1930 | Sard | Italian Endemic | Info | |
| Centromerus incilium (L. Koch, 1881) | It | Info | ||
| Walckenaeria incisa (O. Pickard-Cambridge, 1871) | It | Info | ||
| Erigonoplus inclarus (Simon, 1881) | It | Info | ||
| Gnaphosa inconspecta Simon, 1878 | It | Info | ||
| Araniella inconspicua (Simon, 1874) | It / Sic | Info | ||
| Panamomops inconspicuus (Miller & Valešová, 1964) | It | Info | ||
| Bolephthyphantes index (Thorell, 1856) | It | Info | ||
| Thaumatoncus indicator Simon, 1884 | Sard | Info | ||
| Pelecopsis inedita (O. Pickard-Cambridge, 1875) | It / Sard / Sic | Info | ||
| Tapinesthis inermis (Simon, 1882) | It | Info | ||
| Inermocoelotes inermis (L. Koch, 1855) | It | Info | ||
| Agyneta inermis Tanasevitch, 2019 | It | Info | ||
| Collinsia inerrans (O. Pickard-Cambridge, 1885) | It | Info | ||
| Attulus inexpectus (Logunov & Kronestedt, 1997) | It | Info | ||
| Chalcoscirtus infimus (Simon, 1868) | It / Sard / Sic | Info | ||
| Typhochrestus inflatus Thaler, 1980 | It | Info | ||
| Roncus ingaunus Gardini, 1991 | It | Italian Endemic | Info | |
| Brigittea innocens (O. Pickard-Cambridge, 1872) | It | Info | ||
| Agyneta innotabilis (O. Pickard-Cambridge, 1863) | It | Info | ||
| Euophrys innotata (Simon, 1868) | It / Sic | Info | ||
| Agroeca inopina O. Pickard-Cambridge, 1886 | Sard | Info | ||
| Talavera inopinata Wunderlich, 1993 | It | Info | ||
| Phycosoma inornatum (O. Pickard-Cambridge, 1861) | It | Info | ||
| Alopecosa inquilina (Clerck, 1757) | It | Info | ||
| Tapinocyba insecta (L. Koch, 1869) | It | Info | ||
| Filistata insidiatrix (Forsskål, 1775) | It / Sard / Sic | Info | ||
| Ariadna insidiatrix Audouin, 1826 | It / Sard / Sic | Info | ||
| Acartauchenius insigniceps (Simon, 1894) | Sic | Info | ||
| Robertus insignis O. Pickard-Cambridge, 1908 | It | Info | ||
| Helophora insignis (Blackwall, 1841) | It | Info | ||
| Palliduphantes insignis (O. Pickard-Cambridge, 1913) | It | Info | ||
| Arctosa insignita (Thorell, 1872) | Info | |||
| Walckenaeria insperata Millidge, 1979 | It | Italian Endemic | Info | |
| Rugathodes instabilis (O. Pickard-Cambridge, 1871) | It | Info | ||
| Cyclosa insulana (Costa, 1834) | It / Sard / Sic | Info | ||
| Zelotes insulanus Dalmas, 1922 | It | Info | ||
| Leptoneta insularis Roewer, 1953 | Sard | Italian Endemic | Info | |
| Ephippiochthonius intemelius Gardini, 2013 | It | Italian Endemic | Info | |
| Tetragnatha intermedia Kulczynski, 1891 | It / Sard | Info | ||
| Harpactocrates intermedius Dalmas, 1915 | It | Endemic | Info | |
| Cybaeus intermedius Maurer, 1992 | It | Endemic | Info | |
| Haplodrassus invalidus (O. Pickard-Cambridge, 1872) | Sic | Info | ||
| Charinus ioanniticus (Kritscher, 1959) | It | Info | ||
| Zodarion isabellinum (Simon, 1870) | Sic | Info | ||
| Centromerus isaiai Bosmans, 2015 | Sard | Endemic | Info | |
| Chthonius ischnocheles (Hermann, 1804) | It / Sard / Sic | Info | ||
| Chthonius ischnocheloides Beier, 1973 | It | Italian Endemic | Info | |
| Palliduphantes istrianus (Kulczynski, 1914) | It | Info | ||
| Protoleptoneta italica (Simon, 1907) | It | Info | ||
| Asagena italica (Knoflach, 1996) | It | Info | ||
| Entelecara italica Thaler, 1984 | It | Italian Endemic | Info | |
| Pardosa italica Tongiorgi, 1966 | It | Info | ||
| Histopona italica Brignoli, 1977 | It | Italian Endemic | Info | |
| Acanthocreagris italica (Beier, 1958) | It | Italian Endemic | Info | |
| Larca italica Gardini, 1983 | It | Italian Endemic | Info | |
| Zodarion italicum (Canestrini, 1868) | It / Sard | Info | ||
| Coelotes italicus Kritscher, 1956 | It | Italian Endemic | Info | |
| Euscorpius (Polytrichobothrius) italicus (Herbst, 1800) | It | Info | ||
| Chthonius italicus Beier, 1930 | It | Info | ||
| Roncus italicus (Simon, 1896) | It | Italian Endemic | Info | |
| Geogarypus italicus Gardini, Galli & Zinni, 2017 | It / Sard / Sic | Info | ||
| Pselaphochernes italicus Beier, 1966 | It | Italian Endemic | Info | |
| Theridion italiense Wunderlich, 1995 | It | Info | ||
| Troglohyphantes iulianae Brignoli, 1971 | It | Italian Endemic | Info | |
| Cyrtarachne ixoides (Simon, 1870) | It / Sard / Sic | Info | ||
| Tenuiphantes jacksoni (Schenkel, 1925) | It | Info | ||
| Tenuiphantes jacksonoides (van Helsdingen, 1977) | It | Info | ||
| Erigone jaegeri Baehr, 1984 | It | Info | ||
| Dysdera jana Gasparo & Arnedo, 2009 | Sard | Italian Endemic | Info | |
| Cicurina japonica (Simon, 1886) | It | Introduced | Info | |
| Microdipoena jobi (Kraus, 1967) | It / Sard | Info | ||
| Chthonius jonicus Beier, 1931 | It / Sic | Info | ||
| Evarcha jucunda (Lucas, 1846) | It / Sard / Sic | Info | ||
| Vesubia jugorum (Simon, 1881) | It | Endemic | Info | |
| Amaurobius jugorum L. Koch, 1868 | It | Info | ||
| Chthonius jugorum Beier, 1952 | It | Info | ||
| Neobisium (Neobisium) jugorum (L. Koch, 1873) | It | Info | ||
| Roncus julianus Caporiacco, 1949 | It | Info | ||
| Pocadicnemis juncea Locket & Millidge, 1953 | It / Sard | Info | ||
| Troglohyphantes juris Thaler, 1982 | It | Italian Endemic | Info | |
| Clubiona juvenis Simon, 1878 | It | Info | ||
| Nemesia kahmanni Kraus, 1955 | Sard | Italian Endemic | Info | |
| Zaragozachthonius karamanianus (Hadži, 1937) | It / Sic | Info | ||
| Xysticus kempeleni Thorell, 1872 | It | Info | ||
| Ipa keyserlingi (Ausserer, 1867) | It | Info | ||
| Zygiella keyserlingi (Ausserer, 1871) | It | Info | ||
| Zelotes khostensis Kovblyuk & Ponomarev, 2008 | It | Info | ||
| Piratula knorri (Scopoli, 1763) | It / Sard | Info | ||
| Leviellus kochi (Thorell, 1870) | It / Sard / Sic | Info | ||
| Xysticus kochi Thorell, 1872 | It / Sard / Sic | Info | ||
| Astrobunus kochi Thorell, 1876 | It | Info | ||
| Heliophanus kochii Simon, 1868 | It / Sard / Sic | Info | ||
| Dysdera kollari Doblika, 1853 | It / Sard / Sic | Info | ||
| Eresus kollari Rossi, 1846 | It / Sard / Sic | Info | ||
| Ischyropsalis kollari C. L. Koch, 1839 | It | Info | ||
| Eresus kollari frontalis Latreille, 1819 | Sic | Info | ||
| Bolyphantes kolosvaryi (Caporiacco, 1936) | It | Info | ||
| Troglohyphantes konradi Brignoli, 1975 | It | Italian Endemic | Info | |
| Dictyna kosiorowiczi Simon, 1873 | It | Info | ||
| Incestophantes kotulai (Kulczynski, 1905) | It | Endemic | Info | |
| Scutpelecopsis krausi (Wunderlich, 1980) | It | Info | ||
| Dysdera kulczynskii Simon, 1914 | It | Info | ||
| Lessertinella kulczynskii (Lessert, 1909) | It | Info | ||
| Haplodrassus kulczynskii Lohmander, 1942 | It / Sic | Info | ||
| Clubiona kulczynskii Lessert, 1905 | It | Info | ||
| Alopecosa kuntzi Denis, 1953 | Sic | Info | ||
| Palliduphantes labilis (Simon, 1913) | Sic | Info | ||
| Agelena labyrinthica (Clerck, 1757) | It / Sard / Sic | Info | ||
| Pselaphochernes lacertosus (L. Koch, 1873) | It / Sard / Sic | Info | ||
| Alopecosa laciniosa (Simon, 1876) | Sard | Info | ||
| Arctosa lacustris (Simon, 1876) | It / Sard / Sic | Info | ||
| Ozyptila ladina Thaler & Zingerle, 1998 | It | Italian Endemic | Info | |
| Euryopis laeta (Westring, 1861) | It | Info | ||
| Evarcha laetabunda (C.L. Koch, 1846) | It | Info | ||
| Xysticus laetus Thorell, 1875 | It | Info | ||
| Dasumia laevigata (Thorell, 1873) | It | Endemic | Info | |
| Theridion laevigatum Blackwall, 1870 | Sic | Info | ||
| Mimetus laevigatus (Keyserling, 1863) | It / Sard / Sic | Info | ||
| Astrobunus laevipes (Canestrini, 1872) | It | Info | ||
| Dysdera lagrecai Alicata, 1964 | Sic | Italian Endemic | Info | |
| Pellenes lagrecai Cantarella & Alicata, 2002 | It | Italian Endemic | Info | |
| Bassaniodes lalandei (Audouin, 1826) | Sic | Info | ||
| Bolyphantes lamellaris Tanasevitch, 1990 | It | Info | ||
| Troglohyphantes lanai Isaia & Pantini, 2010 | It | Italian Endemic | Info | |
| Eukoenenia lanai Christian, 2014 | It | Info | ||
| Chthonius lanai Gardini, 2021 | It | Italian Endemic | Info | |
| Walckenaeria languida (Simon, 1915) | It | Info | ||
| Pseudeuophrys lanigera (Simon, 1871) | It / Sic | Info | ||
| Xysticus lanio C.L. Koch, 1835 | It / Sard | Info | ||
| Dysdera lantosquensis Simon, 1882 | It | Endemic | Info | |
| Acanthocreagris lanzai (Beier, 1961) | It | Italian Endemic | Info | |
| Chthonius lanzai lanzai Caporiacco, 1947 | It | Italian Endemic | Info | |
| Chthonius lanzai vannii Callaini, 1986 | It | Italian Endemic | Info | |
| Theridion lapidicola Kulczynski, 1887 | It | Info | ||
| Drassodes lapidosus (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Pardosa lapponica (Thorell, 1872) | It | Info | ||
| Pellenes lapponicus (Sundevall, 1833) | It | Info | ||
| Gnaphosa lapponum (L. Koch, 1866) | It | Info | ||
| Philodromus laricium Simon, 1875 | It | Info | ||
| Dicranopalpus larvatus (Canestrini, 1874) | It / Sard / Sic | Italian Endemic | Info | |
| Dysdera lata Reuss, 1834 | It / Sic | Info | ||
| Gongylidiellum latebricola (O. Pickard-Cambridge, 1871) | It | Info | ||
| Ephippiochthonius latellai Gardini, 2013 | It | Italian Endemic | Info | |
| Brigittea latens (Fabricius, 1775) | It / Sard / Sic | Info | ||
| Tapinocyba latia Millidge, 1979 | It | Italian Endemic | Info | |
| Parachtes latialis Alicata, 1966 | It | Italian Endemic | Info | |
| Cetonana laticeps (Canestrini, 1868) | It / Sard | Info | ||
| Steatoda latifasciata (Simon, 1873) | Sic | Info | ||
| Habrocestum latifasciatum (Simon, 1868) | It | Info | ||
| Diplocephalus latifrons (O. Pickard-Cambridge, 1863) | It | Info | ||
| Enoplognatha latimana Hippa & Oksala, 1982 | It / Sard / Sic | Info | ||
| Mecopisthes latinus Millidge, 1978 | It | Endemic | Info | |
| Euscorpius (Euscorpius) latinus Tropea & Parmakelis, 2022 | It | Italian Endemic | Info | |
| Piratula latitans (Blackwall, 1841) | It / Sard | Info | ||
| Zelotes latreillei (Simon, 1878) | It | Info | ||
| Dactylochelifer latreillei latreillei (Leach, 1817) | It / Sard / Sic | Info | ||
| Micrargus laudatus (O. Pickard-Cambridge, 1881) | It | Info | ||
| Nemoscolus laurae (Simon, 1868) | Sic | Info | ||
| Caracladus leberti (Roewer, 1942) | It | Endemic | Info | |
| Megabunus lentipes Muster & Komposch, 2015 | It | Italian Endemic | Info | |
| Chthonius leoi (Callaini, 1988) | Sard | Italian Endemic | Info | |
| Histopona leonardoi Bolzern, Pantini & Isaia, 2013 | It | Endemic | Info | |
| Roncus leonidae leonidae Beier, 1942 | It | Italian Endemic | Info | |
| Roncus leonidae ruffoi Gardini, 1991 | It | Italian Endemic | Info | |
| Arctosa leopardus (Sundevall, 1833) | It / Sard / Sic | Info | ||
| Formiphantes lephthyphantiformis (Strand, 1907) | It | Info | ||
| Harpactea lepida (C.L. Koch, 1838) | It | Info | ||
| Rhysodromus lepidus (Blackwall, 1870) | Sic | Info | ||
| Maro lepidus Casemir, 1961 | It | Info | ||
| Gnaphosa leporina (L. Koch, 1866) | It | Info | ||
| Hogna leprieuri (Simon, 1876) | Sic | Info | ||
| Peltonychia leprieuri (Lucas, 1861) | It | Endemic | Info | |
| Lepthyphantes leprosus (Ohlert, 1865) | It / Sic | Info | ||
| Centromerus leruthi Fage, 1933 | It | Info | ||
| Troglohyphantes lessinensis Caporiacco, 1936 | It | Italian Endemic | Info | |
| Holoscotolemon lessiniense Martens, 1978 | It | Italian Endemic | Info | |
| Chthonius lessiniensis Schawaller, 1982 | It | Italian Endemic | Info | |
| Porrhoclubiona leucaspis (Simon, 1932) | It / Sard / Sic | Info | ||
| Mysmena leucoplagiata (Simon, 1880) | It / Sic | Info | ||
| Garypus levantinus Navás, 1925 | It / Sard / Sic | Info | ||
| Neon levis (Simon, 1871) | It / Sic | Info | ||
| Centromerus levitarsis (Simon, 1884) | It | Info | ||
| Calocheiridius libanoticus Beier, 1955 | It / Sard / Sic | Info | ||
| Cryphoeca lichenum L. Koch, 1876 | It | Endemic | Info | |
| Acantholycosa lignaria (Clerck, 1757) | It | Info | ||
| Ephippiochthonius ligur Gardini, 2013 | It | Italian Endemic | Info | |
| Tapinocyba ligurica Thaler, 1976 | It | Endemic | Info | |
| Aterigena ligurica (Simon, 1916) | It | Endemic | Info | |
| Palliduphantes liguricus (Simon, 1929) | It | Endemic | Info | |
| Micrommata ligurina (C.L. Koch, 1845) | It / Sard / Sic | Info | ||
| Dysdera ligustica Gasparo, 1997 | It | Italian Endemic | Info | |
| Phalangium ligusticum (Roewer, 1923) | It | Info | ||
| Neobisium (Neoccitanobisium) ligusticum (Callaini, 1981) | It | Info | ||
| Roncus ligusticus Beier, 1930 | It | Italian Endemic | Info | |
| Chthonius ligusticus ligusticus Beier, 1930 | It | Italian Endemic | Info | |
| Parachtes limbarae (Kraus, 1955) | Sard | Italian Endemic | Info | |
| Leiobunum limbatum L. Koch, 1861 | It | Info | ||
| Agraecina lineata (Simon, 1878) | It / Sard | Info | ||
| Phlegra lineata (C.L. Koch, 1846) | It / Sard / Sic | Info | ||
| Larinia lineata (Lucas, 1846) | Sic | Info | ||
| Stegodyphus lineatus (Latreille, 1817) | It / Sic | Info | ||
| Stemonyphantes lineatus (Linnaeus, 1758) | It | Info | ||
| Xysticus lineatus (Westring, 1851) | It | Info | ||
| Oxyopes lineatus lineatus Latreille, 1806 | It / Sard / Sic | Info | ||
| Oxyopes lineatus occidentalis Kulczynski, 1907 | It | Info | ||
| Heliophanus lineiventris Simon, 1868 | It / Sic | Info | ||
| Pachygnatha listeri Sundevall, 1830 | It | Info | ||
| Ischyropsalis lithoclasica Schönhofer & Martens, 2010 | It | Italian Endemic | Info | |
| Pselaphochernes litoralis litoralis Beier, 1956 | It | Info | ||
| Pselaphochernes litoralis siculus Beier, 1963 | Sic | Italian Endemic | Info | |
| Diaea livens Simon, 1876 | It | Info | ||
| Robertus lividus (Blackwall, 1836) | It | Info | ||
| Philodromus lividus Simon, 1875 | It / Sard | Info | ||
| Argiope lobata (Pallas, 1772) | It / Sard / Sic | Info | ||
| Cybaeopsis lodovicii Ballarin & Pantini, 2022 | It | Italian Endemic | Info | |
| Gnaphosa lonai Caporiacco, 1949 | Sic | Italian Endemic | Info | |
| Diplocephalus longicarpus (Simon, 1884) | It | Info | ||
| Tapinopa longidens (Wider, 1834) | It | Info | ||
| Erigone longipalpis (Sundevall, 1830) | It | Info | ||
| Philodromus longipalpis Simon, 1870 | It | Info | ||
| Orchestina longipes Dalmas, 1922 | It | Info | ||
| Zelotes longipes (L. Koch, 1866) | It | Info | ||
| Attulus longipes (Canestrini, 1873) | It | Endemic | Info | |
| Cepheia longiseta (Simon, 1881) | It / Sard | Info | ||
| Palliduphantes longiseta (Simon, 1884) | It | Endemic | Info | |
| Marpissa longiuscola (Simon, 1871) | It | Info | ||
| Araeoncus longiusculus (O. Pickard-Cambridge, 1875) | It / Sard | Endemic | Info | |
| Harpactea longobarda Pesarini, 2001 | It | Info | ||
| Aelurillus lopadusae Cantarella, 1983 | Sic | Info | ||
| Poecilochroa loricata Kritscher, 1996 | Sic | Info | ||
| Silhouettella loricatula (Roewer, 1942) | It / Sard / Sic | Introduced | Info | |
| Sosticus loricatus (L. Koch, 1866) | It | Introduced | Info | |
| Roncus lubricus L. Koch, 1873 | It / Sard / Sic | Info | ||
| Tapinocyba lucana Millidge, 1979 | It | Italian Endemic | Info | |
| Ephippiochthonius lucanus (Callaini, 1984) | It | Italian Endemic | Info | |
| Altella lucida (Simon, 1874) | It / Sic | Info | ||
| Troglohyphantes lucifer Isaia, Mammola & Pantini, 2017 | It | Italian Endemic | Info | |
| Troglohyphantes lucifuga (Simon, 1884) | It | Endemic | Info | |
| Gnaphosa lucifuga (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Xysticus luctator L. Koch, 1870 | It | Info | ||
| Pardosa luctinosa Simon, 1876 | It | Info | ||
| Xysticus luctuosus (Blackwall, 1836) | It / Sard | Info | ||
| Aelurillus luctuosus (Lucas, 1846) | Sard / Sic | Info | ||
| Zodarion ludibundum Simon, 1914 | It / Sic | Info | ||
| Peponocranium ludicrum (O. Pickard-Cambridge, 1861) | It | Info | ||
| Pardosa lugubris (Walckenaer, 1802) | It | Info | ||
| Gnaphosa lugubris (C.L. Koch, 1839) | It / Sard | Info | ||
| Neobisium (Ommatoblothrus) lulense Gardini, 1982 | Sard | Italian Endemic | Info | |
| Parasteatoda lunata (Clerck, 1757) | It / Sard / Sic | Info | ||
| Agroeca lusatica (L. Koch, 1875) | It | Info | ||
| Bolyphantes luteolus (Blackwall, 1833) | It / Sic | Info | ||
| Drassodes luteomicans (Simon, 1878) | It / Sard / Sic | Info | ||
| Clubiona lutescens Westring, 1851 | It | Info | ||
| Drassodes lutescens (C.L. Koch, 1839) | It / Sard / Sic | Info | ||
| Arctosa lutetiana (Simon, 1876) | It | Info | ||
| Drassyllus lutetianus (L. Koch, 1866) | It / Sard | Info | ||
| Prochora lycosiformis (O. Pickard-Cambridge, 1872) | It / Sic | Info | ||
| Anelasmocephalus lycosinus (Soerensen, 1873) | It | Italian Endemic | Info | |
| Marinarozelotes lyonneti (Audouin, 1826) | It / Sard / Sic | Info | ||
| Zelotes maccaricus Di Franco, 1998 | Sic | Italian Endemic | Info | |
| Cheiracanthium macedonicum Drensky, 1921 | It / Sic | Info | ||
| Xysticus macedonicus Šilhavý, 1944 | It | Info | ||
| Haplodrassus macellinus (Thorell, 1871) | It / Sard / Sic | Info | ||
| Tibellus macellus Simon, 1875 | It / Sard / Sic | Info | ||
| Nemesia macrocephala Ausserer, 1871 | Sic | Info | ||
| Mastigusa macrophthalma (Kulczynski, 1897) | It | Info | ||
| Arctosa maculata (Hahn, 1822) | It | Info | ||
| Nemesia maculatipes Ausserer, 1871 | It / Sard | Info | ||
| Zodarion maculatum (Simon, 1870) | It / Sic | Info | ||
| Oecobius maculatus Simon, 1870 | It / Sard / Sic | Info | ||
| Paratrachelas maculatus (Thorell, 1875) | It | Info | ||
| Rhacochelifer maculatus (L. Koch, 1873) | It / Sard / Sic | Info | ||
| Episinus maculipes Cavanna, 1876 | It / Sard / Sic | Info | ||
| Tuberta maerens (O. Pickard-Cambridge, 1863) | It | Info | ||
| Hahnia maginii Brignoli, 1977 | It | Italian Endemic | Info | |
| Ephippiochthonius magrinii Gardini, 2013 | It | Italian Endemic | Info | |
| Liocranum majus Simon, 1878 | It | Info | ||
| Theridion malagaense Wunderlich, 2011 | Sard | Info | ||
| Ephippiochthonius maltensis (Mahnert, 1975) | Sic | Info | ||
| Nemesia manderstjernae L. Koch, 1871 | It | Info | ||
| Enoplognatha mandibularis (Lucas, 1846) | It / Sard / Sic | Info | ||
| Zora manicata Simon, 1878 | It / Sard / Sic | Info | ||
| Euophrys manicata (Simon, 1871) | Sic | Info | ||
| Microbisium manicatum (L. Koch, 1873) | It | Info | ||
| Zelotes manius (Simon, 1878) | It | Info | ||
| Mansuphantes mansuetus (Thorell, 1875) | It | Info | ||
| Centromerus marciai Bosmans & Gasparo, 2015 | Sard | Italian Endemic | Info | |
| Chthonius marciai Gardini, 2021 | Sard | Italian Endemic | Info | |
| Euryopis margaritata (L. Koch, 1867) | It | Info | ||
| Philodromus margaritatus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Minicia marginella (Wider, 1834) | It | Info | ||
| Alopecosa mariae (Dahl, 1908) | It | Info | ||
| Cybaeodes marinae Di Franco, 1989 | It / Sard / Sic | Italian Endemic | Info | |
| Tibellus maritimus (Menge, 1875) | It / Sic | Info | ||
| Chaerea maritimus Simon, 1884 | It | Info | ||
| Clubiona marmorata L. Koch, 1866 | It | Info | ||
| Araneus marmoreus Clerck, 1757 | It / Sard / Sic | Info | ||
| Neobisium (Neobisium) martae lombardicum Beier, 1934 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) martae martae (Menozzi, 1920) | It | Italian Endemic | Info | |
| Trogulus martensi Chemini, 1983 | It | Info | ||
| Allochernes masi (Navás, 1923) | Sard / Sic | Info | ||
| Urocoras matesianus (de Blauwe, 1973) | It | Italian Endemic | Info | |
| Linyphia maura Thorell, 1875 | Sard | Info | ||
| Tapinocyba maureri Thaler, 1991 | It | Endemic | Info | |
| Mesiotelus mauritanicus Simon, 1909 | Sic | Info | ||
| Calocheiridius mavromoustakisi Beier & Turk, 1952 | It / Sic | Info | ||
| Entelecara media Kulczynski, 1887 | It | Info | ||
| Zoropsis media Simon, 1878 | It / Sard | Info | ||
| Diplocentria mediocris (Simon, 1884) | It | Info | ||
| Coelotes mediocris Kulczynski, 1887 | It | Info | ||
| Parapelecopsis mediocris (Kulczynski, 1899) | It | Info | ||
| Robertus mediterraneus Eskov, 1987 | It | Info | ||
| Pulchellodromus medius (O. Pickard-Cambridge, 1872) | It | Info | ||
| Minyriolus medusa (Simon, 1881) | It / Sard | Info | ||
| Dipoena melanogaster (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Ostearius melanopygius (O. Pickard-Cambridge, 1880) | It / Sic | Introduced | Info | |
| Theridion melanurum Hahn, 1831 | It / Sard / Sic | Info | ||
| Heliophanus melinus L. Koch, 1867 | It / Sard / Sic | Info | ||
| Roncus melloguensis Gardini, 1982 | Sard | Italian Endemic | Info | |
| Neaetha membrosa (Simon, 1868) | It / Sard / Sic | Info | ||
| Meta menardi (Latreille, 1804) | It / Sic | Info | ||
| Tenuiphantes mengei (Kulczynski, 1887) | It / Sard | Info | ||
| Metellina mengei (Blackwall, 1869) | It / Sard / Sic | Info | ||
| Pelecopsis mengei (Simon, 1884) | It / Sard | Info | ||
| Domitius menozzii (Caporiacco, 1934) | It | Italian Endemic | Info | |
| Roncus menozzii (Caporiacco, 1923) | It | Italian Endemic | Info | |
| Evansia merens O. Pickard-Cambridge, 1901 | It | Info | ||
| Metellina merianae (Scopoli, 1763) | It / Sard / Sic | Info | ||
| Hysterochelifer meridianus (L. Koch, 1873) | It / Sard | Info | ||
| Nemesia meridionalis (Costa, 1835) | It / Sard / Sic | Info | ||
| Asagena meridionalis Kulczynski, 1894 | It | Info | ||
| Nelima meridionalis Marcellino, 1972 | It / Sic | Italian Endemic | Info | |
| Mughiphantes merretti (Millidge, 1975) | It | Italian Endemic | Info | |
| Agyneta mesasiatica Tanasevitch, 2000 | It | Info | ||
| Lepthyphantes messapicus Caporiacco, 1939 | It | Italian Endemic | Info | |
| Ephippiochthonius messapicus Gardini, 2013 | It | Italian Endemic | Info | |
| Zelotes messinai Di Franco, 1995 | Sic | Italian Endemic | Info | |
| Zelotes metellus (Roewer, 1928) | It | Info | ||
| Micaria micans (Blackwall, 1858) | It | Info | ||
| Evarcha michailovi Logunov, 1992 | It | Info | ||
| Troglohyphantes microcymbium Pesarini, 2001 | It | Italian Endemic | Info | |
| Dysdera microdonta Gasparo, 2014 | It | Endemic | Info | |
| Inermocoelotes microlepidus (de Blauwe, 1973) | It | Info | ||
| Acanthocreagris microphthalma Callaini, 1986 | It | Italian Endemic | Info | |
| Porrhomma microphthalmum (O. Pickard-Cambridge, 1871) | It | Info | ||
| Porrhomma microps (Roewer, 1931) | It | Info | ||
| Midia midas (Simon, 1884) | It | Info | ||
| Cheiracanthium mildei L. Koch, 1864 | It / Sard / Sic | Info | ||
| Mecopisthes millidgei Wunderlich, 1995 | Sard | Italian Endemic | Info | |
| Linyphia mimonti Simon, 1885 | It / Sic | Info | ||
| Xerolycosa miniata (C.L. Koch, 1834) | It | Info | ||
| Neobisium (Neobisium) minimum (Beier, 1928) | It | Info | ||
| Phrurolithus minimus C.L. Koch, 1839 | It | Info | ||
| Acartauchenius minor (Millidge, 1979) | It | Italian Endemic | Info | |
| Cybaeus minor Chyzer, 1897 | It | Info | ||
| Trachelas minor O. Pickard-Cambridge, 1872 | It / Sard | Info | ||
| Haplodrassus minor (O. Pickard-Cambridge, 1879) | It | Info | ||
| Parasiro minor Juberthie, 1958 | Sard | Info | ||
| Geogarypus minor (L. Koch, 1873) | It / Sard / Sic | Info | ||
| Theonoe minutissima (O. Pickard-Cambridge, 1879) | It | Info | ||
| Archaeodictyna minutissima (Miller, 1958) | It | Info | ||
| Lepthyphantes minutus (Blackwall, 1833) | It / Sard / Sic | Info | ||
| Maro minutus O. Pickard-Cambridge, 1907 | It | Info | ||
| Pisaura mirabilis (Clerck, 1757) | It / Sard / Sic | Info | ||
| Tuberta mirabilis (Thorell, 1871) | It | Italian Endemic | Info | |
| Eukoenenia mirabilis Grassi & Calandruccio, 1885 | It / Sard / Sic | Info | ||
| Tegenaria mirifica Thaler, 1987 | It | Endemic | Info | |
| Aphileta misera (O. Pickard-Cambridge, 1882) | It | Info | ||
| Walckenaeria mitrata (Menge, 1868) | It | Info | ||
| Pardosa mixta (Kulczynski, 1887) | It | Info | ||
| Gnaphosa modestior Kulczynski, 1897 | It | Info | ||
| Thomisus modestus Blackwall, 1870 | It | Info | ||
| Howaia mogera (Yaginuma, 1972) | It | Introduced | Info | |
| Cteniza moggridgei O. Pickard-Cambridge, 1874 | It / Sard | Endemic | Info | |
| Cybaeodes molara (Roewer, 1960) | Sic | Italian Endemic | Info | |
| Nomisia molendinaria (L. Koch, 1866) | It | Info | ||
| Abacoproeces molestus Thaler, 1973 | It | Endemic | Info | |
| Agyneta mollis (O. Pickard-Cambridge, 1871) | It / Sard | Info | ||
| Setaphis mollis (O. Pickard-Cambridge, 1874) | Sic | Info | ||
| Tenuiphantes monachus (Simon, 1884) | It | Info | ||
| Aelurillus monardi (Lucas, 1846) | It / Sard / Sic | Info | ||
| Ephippiochthonius monguzzii Gardini, 2013 | It | Italian Endemic | Info | |
| Walckenaeria monoceros (Wider, 1834) | It / Sic | Info | ||
| Janetschekia monodon (O. Pickard-Cambridge, 1873) | It | Info | ||
| Neriene montana (Clerck, 1757) | It | Info | ||
| Tetragnatha montana Simon, 1874 | It / Sard | Info | ||
| Zygiella montana (C.L. Koch, 1834) | It / Sard | Info | ||
| Gnaphosa montana (L. Koch, 1866) | It / Sic | Info | ||
| Iberina montana (Blackwall, 1841) | It | Info | ||
| Cheiracanthium montanum L. Koch, 1877 | It | Info | ||
| Porrhomma montanum Jackson, 1913 | It | Info | ||
| Palliduphantes montanus (Kulczynski, 1898) | It | Endemic | Info | |
| Cybaeus montanus Maurer, 1992 | It | Endemic | Info | |
| Dysdera monterossoi Alicata, 1964 | It | Italian Endemic | Info | |
| Zodarion montesacrense Bosmans, 2019 | It | Italian Endemic | Info | |
| Anguliphantes monticola (Kulczynski, 1881) | It | Info | ||
| Pardosa monticola (Clerck, 1757) | It | Info | ||
| Titanoeca monticola (Simon, 1870) | It | Info | ||
| Talavera monticola (Kulczynski, 1884) | It | Info | ||
| Mimetus monticola (Blackwall, 1870) | It | Info | ||
| Oreoneta montigena (L. Koch, 1872) | It | Info | ||
| Chernes montigenus (Simon, 1879) | It | Info | ||
| Holoscotolemon monzinii Tedeschi & Sciaky, 1994 | It | Italian Endemic | Info | |
| Mitopus morio (Fabricius, 1779) | It | Info | ||
| Typhlonesticus morisii (Brignoli, 1975) | It | Italian Endemic | Info | |
| Pardosa morosa (L. Koch, 1870) | It | Info | ||
| Mycula mossakowskii Schikora, 1994 | It | Info | ||
| Ischyropsalis muellneri Hamann, 1898 | It | Info | ||
| Mughiphantes mughi (Fickert, 1875) | It | Info | ||
| Chthonius multidentatus Beier, 1963 | Sic | E | Info | |
| Zelotes mundus (Kulczynski, 1897) | Info | |||
| Urocoras munieri (Simon, 1880) | It | Endemic | Info | |
| Lycosa munieri Simon, 1876 | Sard | Info | ||
| Atypus muralis Bertkau, 1890 | It | Info | ||
| Gongylidiellum murcidum Simon, 1884 | It / Sard | Info | ||
| Palliduphantes murphyi Ballarin & Pantini, 2022 | It | Italian Endemic | Info | |
| Gnaphosa muscorum (L. Koch, 1866) | It | Info | ||
| Marpissa muscosa (Clerck, 1757) | It / Sard | Info | ||
| Cheiridium museorum (Leach, 1817) | It | Info | ||
| Ruborridion musivum (Simon, 1873) | It / Sard / Sic | Info | ||
| Marinarozelotes mutabilis (Simon, 1878) | It / Sic | Info | ||
| Salticus mutabilis Lucas, 1846 | It / Sard / Sic | Info | ||
| Leptorchestes mutilloides (Lucas, 1846) | It / Sard / Sic | Info | ||
| Cresmatoneta mutinensis (Canestrini, 1868) | It / Sard / Sic | Info | ||
| Acanthocreagris myops (Simon, 1881) | It | Info | ||
| Syedra myrmicarum (Kulczynski, 1882) | It | Info | ||
| Theridion mystaceum L. Koch, 1870 | It / Sard / Sic | Info | ||
| Urozelotes mysticus Platnick & Murphy, 1984 | Sic | Italian Endemic | Info | |
| Metopobactrus nadigi Thaler, 1976 | It | Endemic | Info | |
| Pritha nana (Simon, 1868) | It / Sard / Sic | Info | ||
| Ephippiochthonius nanus (Beier, 1953) | It / Sic | Info | ||
| Lathys narbonensis (Simon, 1876) | It | Info | ||
| Nelima narcisi Novak & Slana, 2003 | It | Info | ||
| Rhomphaea nasica (Simon, 1873) | It / Sard / Sic | Info | ||
| Theridion nasutum Wunderlich, 1995 | Sard | Italian Endemic | Info | |
| Nusoncus nasutus (Schenkel, 1925) | It | Info | ||
| Holoscotolemon naturae Tedeschi & Sciaky, 1994 | It | Italian Endemic | Info | |
| Harpactea nausicaae Brignoli, 1976 | It | Info | ||
| Hahnia nava (Blackwall, 1841) | It | Info | ||
| Oecobius navus Blackwall, 1859 | It / Sard / Sic | Info | ||
| Pseudeuophrys nebrodensis Alicata & Cantarella, 2000 | It / Sard / Sic | Italian Endemic | Info | |
| Pardosa nebulosa (Thorell, 1872) | It | Info | ||
| Megalepthyphantes nebulosus (Sundevall, 1830) | It | Info | ||
| Theridion negebense Levy & Amitai, 1982 | Sic | Info | ||
| Clubiona neglecta O. Pickard-Cambridge, 1862 | It / Sard | Info | ||
| Robertus neglectus (O. Pickard-Cambridge, 1871) | It | Info | ||
| Parapelecopsis nemoralioides (O. Pickard-Cambridge, 1884) | It | Info | ||
| Parapelecopsis nemoralis (Blackwall, 1841) | It / Sic | Info | ||
| Xerolycosa nemoralis (Westring, 1861) | It / Sard | Info | ||
| Zora nemoralis (Blackwall, 1861) | It | Info | ||
| Acanthocreagris nemoralis Gardini, 1998 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) nemorense Callaini, 1991 | Sic | Italian Endemic | Info | |
| Gonatium nemorivagum (O. Pickard-Cambridge, 1875) | It / Sard | Info | ||
| Trogulus nepaeformis (Scopoli, 1763) | It | Info | ||
| Singa neta (O. Pickard-Cambridge, 1872) | It | Info | ||
| Dysdera nicaeensis Thorell, 1873 | It | Endemic | Info | |
| Mecopisthes nicaeensis (Simon, 1884) | It | Info | ||
| Euscorpius (Euscorpius) niciensis (C.L. Koch, 1841) | It | Endemic | Info | |
| Chthonius nicolosii Gardini, 2021 | Sic | Italian Endemic | Info | |
| Macaroeris nidicolens (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Gnaphosa nigerrima L. Koch, 1877 | It | Info | ||
| Pardosa nigra (C.L. Koch, 1834) | It / Sard | Info | ||
| Troglohyphantes nigraerosae Brignoli, 1971 | It | Italian Endemic | Info | |
| Pardosa nigriceps (Thorell, 1856) | It | Info | ||
| Zodarion nigriceps (Simon, 1873) | Sard | Endemic | Info | |
| Erigone nigrimana Thorell, 1875 | It | Info | ||
| Bathyphantes nigrinus (Westring, 1851) | It | Info | ||
| Phrurolithus nigrinus (Simon, 1878) | It | Info | ||
| Leiobunum nigripalpe Simon, 1879 | It | Info | ||
| Oxyopes nigripalpis Kulczynski, 1891 | It / Sard / Sic | Info | ||
| Agyneta nigripes (Simon, 1884) | It | Info | ||
| Cozyptila nigristernum (Dalmas, 1922) | It | Info | ||
| Tetragnatha nigrita Lendl, 1886 | It | Info | ||
| Hylyphantes nigritus (Simon, 1881) | It | Info | ||
| Erigonoplus nigrocaeruleus (Simon, 1881) | It / Sard | Info | ||
| Pellenes nigrociliatus (Simon, 1875) | It / Sard / Sic | Info | ||
| Enoplognatha nigromarginata (Lucas, 1846) | It / Sard | Info | ||
| Bolyphantes nigropictus Simon, 1884 | It / Sard | Info | ||
| Platnickina nigropunctata (Lucas, 1846) | It / Sic | Info | ||
| Syedra nigrotibialis Simon, 1884 | It / Sard | Endemic | Info | |
| Heterotheridion nigrovariegatum (Simon, 1873) | It / Sic | Info | ||
| Dicymbium nigrum (Blackwall, 1834) | It | Info | ||
| Heser nilicola (O. Pickard-Cambridge, 1874) | It / Sard / Sic | Info | ||
| Dysdera ninnii Canestrini, 1868 | It | Endemic | Info | |
| Psammitis ninnii (Thorell, 1872) | It / Sic | Info | ||
| Tetragnatha nitens (Audouin, 1826) | It / Sard / Sic | Introduced | Info | |
| Singa nitidula C.L. Koch, 1844 | It | Info | ||
| Zodarion nitidum (Audouin, 1826) | It | Info | ||
| Improphantes nitidus (Thorell, 1875) | It | Info | ||
| Cryphoeca nivalis Schenkel, 1919 | It | Endemic | Info | |
| Titanoeca nivalis Simon, 1874 | It | Info | ||
| Micaria nivosa L. Koch, 1866 | It | Info | ||
| Marpissa nivoyi (Lucas, 1846) | It / Sic | Info | ||
| Erigonoplus nobilis Thaler, 1991 | It | Italian Endemic | Info | |
| Steatoda nobilis (Thorell, 1875) | It / Sard | Introduced | Info | |
| Mesostalita nocturna (Roewer, 1931) | It | Endemic | Info | |
| Callilepis nocturna (Linnaeus, 1758) | It / Sic | Info | ||
| Lepthyphantes nodifer Simon, 1884 | It | Info | ||
| Walckenaeria nodosa O. Pickard-Cambridge, 1873 | It | Info | ||
| Lamprochernes nodosus nodosus (Schrank, 1803) | It / Sic | Info | ||
| Turkozelotes noname Mazzia & Cornic, 2020 | It | Info | ||
| Araneus nordmanni (Thorell, 1870) | It | Info | ||
| Acantholycosa norvegica sudetica (L. Koch, 1875) | It | Info | ||
| Lepthyphantes notabilis Kulczynski, 1887 | It | Info | ||
| Pisaura novicia (L. Koch, 1878) | It | Info | ||
| Dysdera nubila Simon, 1882 | It | Info | ||
| Xysticus nubilus Simon, 1875 | It / Sard / Sic | Info | ||
| Berlandina nubivaga (Simon, 1878) | It | Endemic | Info | |
| Walckenaeria nudipalpis (Westring, 1851) | It | Info | ||
| Selamia numidica Jocqué & Bosmans, 2001 | Sic | Info | ||
| Harpactea nuragica Alicata, 1966 | Sard | Italian Endemic | Info | |
| Amblyocarenum nuragicum Decae, Colombo & Manunza, 2014 | Sard | Italian Endemic | Info | |
| Porrhomma oblitum (O. Pickard-Cambridge, 1871) | It | Info | ||
| Thanatus oblongiusculus (Lucas, 1846) | It / Sard | Info | ||
| Zelotes oblongus (C.L. Koch, 1833) | It | Info | ||
| Tibellus oblongus (Walckenaer, 1802) | It / Sard | Info | ||
| Heriaeus oblongus Simon, 1918 | It | Info | ||
| Tibellus oblongus maculatus Caporiacco, 1950 | It | Info | ||
| Amblyocarenum obscurum (Ausserer, 1871) | Sic | Italian Endemic | Info | |
| Cnephalocotes obscurus (Blackwall, 1834) | It | Info | ||
| Obscuriphantes obscurus (Blackwall, 1841) | It | Info | ||
| Xysticus obscurus Collett, 1877 | It | Info | ||
| Pseudeuophrys obsoleta (Simon, 1868) | It / Sic | Info | ||
| Walckenaeria obtusa Blackwall, 1836 | It | Info | ||
| Tetragnatha obtusa C.L. Koch, 1837 | It / Sic | Info | ||
| Amaurobius obustus L. Koch, 1868 | It | Info | ||
| Cheiracanthium occidentale L. Koch, 1882 | It | Info | ||
| Pardosa occidentalis Simon, 1881 | Sard | Info | ||
| Gnaphosa occidentalis Simon, 1878 | It | Info | ||
| Amaurobius occidentalis Simon, 1892 | It | Info | ||
| Anagraphis ochracea (L. Koch, 1867) | It / Sard / Sic | Info | ||
| Cyclosa oculata (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Lycosa oculata (Simon, 1876) | Sard | Info | ||
| Neobisium (Ommatoblothrus) oenotricum Callaini, 1987 | It | Italian Endemic | Info | |
| Zoropsis oertzeni Dahl, 1901 | It | Info | ||
| Euscorpius (Euscorpius) oglasae Caporiacco, 1950 | Italian Endemic | Info | ||
| Harpactea oglasana Gasparo, 1992 | It | Italian Endemic | Info | |
| Ohlertidion ohlerti (Thorell, 1870) | It | Info | ||
| Calocheiridius olivieri (Simon, 1879) | Sard / Sic | Info | ||
| Gibbaranea omoeda (Thorell, 1870) | It / Sard | Info | ||
| Cheiracanthium oncognathum Thorell, 1871 | It | Info | ||
| Hahnia ononidum Simon, 1875 | It | Info | ||
| Thomisus onustus Walckenaer, 1805 | It / Sard / Sic | Info | ||
| Phalangium opilio Linnaeus, 1758 | It / Sard | Info | ||
| Pholcus opilionoides (Schrank, 1781) | It / Sard | Info | ||
| Dicranolasma opilionoides (L. Koch, 1867) | It | Info | ||
| Araniella opisthographa (Kulczynski, 1905) | It / Sic | Info | ||
| Theridula opulenta (Walckenaer, 1841) | It | Introduced | Info | |
| Peponocranium orbiculatum (O. Pickard-Cambridge, 1882) | It | Info | ||
| Pardosa oreophila Simon, 1937 | It | Info | ||
| Holoscotolemon oreophilum Martens, 1978 | It | Info | ||
| Pisaura orientalis Kulczynski, 1913 | It | Info | ||
| Agelena orientalis C.L. Koch, 1837 | It / Sic | Info | ||
| Heriaeus orientalis Simon, 1918 | It / Sic | Info | ||
| Agyneta orites (Thorell, 1875) | It | Endemic | Info | |
| Mitostoma orobicum (Caporiacco, 1949) | It | Italian Endemic | Info | |
| Chthonius orthodactylus (Leach, 1817) | It / Sard / Sic | Info | ||
| Dysdera osellai Alicata, 1973 | It / Sic | Italian Endemic | Info | |
| Coelotes osellai de Blauwe, 1973 | It | Endemic | Info | |
| Anelasmocephalus osellai Martens & Chemini, 1988 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) osellai Callaini, 1983 | It | Italian Endemic | Info | |
| Enoplognatha ovata (Clerck, 1757) | It / Sard / Sic | Info | ||
| Centromerus pabulator (O. Pickard-Cambridge, 1875) | It | Info | ||
| Coelotes pabulator Simon, 1875 | It | Endemic | Info | |
| Neobisium (Neobisium) pacei Callaini, 1991 | Sic | Italian Endemic | Info | |
| Mecynargus paetulus (O. Pickard-Cambridge, 1875) | It | Info | ||
| Tegenaria pagana C.L. Koch, 1840 | It / Sard / Sic | Info | ||
| Dysdera paganettii Deeleman-Reinhold, 1988 | It | Italian Endemic | Info | |
| Asthenargus paganus (Simon, 1884) | It | Info | ||
| Histopona palaeolithica (Brignoli, 1971) | It | Italian Endemic | Info | |
| Paidiscura pallens (Blackwall, 1834) | It / Sard / Sic | Info | ||
| Tapinocyba pallens (O. Pickard-Cambridge, 1873) | It | Info | ||
| Scotina palliardii (L. Koch, 1881) | It / Sic | Info | ||
| Pritha pallida (Kulczynski, 1897) | It / Sic | Info | ||
| Eidmannella pallida (Emerton, 1875) | It | Introduced | Info | |
| Clubiona pallidula (Clerck, 1757) | It / Sard | Info | ||
| Porrhomma pallidum Jackson, 1913 | It | Info | ||
| Palliduphantes pallidus (O. Pickard-Cambridge, 1871) | It | Info | ||
| Araneus pallidus (Olivier, 1789) | It | Info | ||
| Amaurobius pallidus L. Koch, 1868 | It | Info | ||
| Micaria pallipes (Lucas, 1846) | It / Sard | Info | ||
| Olpium pallipes balcanicum Beier, 1931 | It | Info | ||
| Olpium pallipes pallipes (Lucas, 1849) | It / Sard / Sic | Info | ||
| Panamomops palmgreni Thaler, 1973 | It | Endemic | Info | |
| Lophopilio palpinalis (Herbst, 1799) | It | Info | ||
| Pardosa paludicola (Clerck, 1757) | It | Info | ||
| Oedothorax paludigena Simon, 1926 | It / Sard | Info | ||
| Pardosa palustris (Linnaeus, 1758) | It | Info | ||
| Nemesia pannonica Herman, 1879 | It | Info | ||
| Zodarion pantaleonii Bosmans & Pantini, 2019 | Sard | Italian Endemic | Info | |
| Dinocheirus panzeri (C.L. Koch, 1837) | It / Sard | Info | ||
| Chthonius paolettii Beier, 1973 | It | Italian Endemic | Info | |
| Roncus paolettii Mahnert, 1980 | It | Italian Endemic | Info | |
| Phoroncidia paradoxa (Lucas, 1846) | It | Info | ||
| Trabea paradoxa Simon, 1876 | It / Sard / Sic | Info | ||
| Gonatium paradoxum (L. Koch, 1869) | It | Info | ||
| Hyptiotes paradoxus (C.L. Koch, 1834) | It / Sard / Sic | Info | ||
| Monaeses paradoxus (Lucas, 1846) | It / Sard / Sic | Info | ||
| Centromerus paradoxus (Simon, 1884) | It | Info | ||
| Pelecopsis parallela (Wider, 1834) | It | Info | ||
| Zora parallela Simon, 1878 | It | Info | ||
| Psammitis parallela (Simon, 1873) | It / Sard | Info | ||
| Thyreosthenius parasiticus (Westring, 1851) | It | Info | ||
| Zora pardalis Simon, 1878 | It | Info | ||
| Tegenaria parietina (Fourcroy, 1785) | It / Sard / Sic | Info | ||
| Opilio parietinus (De Geer, 1778) | It | Info | ||
| Tegenaria parmenidis Brignoli, 1971 | It / Sic | Italian Endemic | Info | |
| Occidenchthonius parmensis (Beier, 1963) | It | Info | ||
| Zelotes paroculus Simon, 1914 | It | Info | ||
| Euscorpius parthenopeius Tropea, Parmakelis, Sziszkosz, Balanika & Bouderka, 2014 | It | Italian Endemic | Info | |
| Pritha parva Legittimo, Simeon, Di Pompeo & Kulczycki, 2017 | It | Info | ||
| Tegenaria parvula Thorell, 1875 | It / Sic | Endemic | Info | |
| Setaphis parvula (Lucas, 1846) | It / Sard / Sic | Info | ||
| Theridion parvulum Blackwall, 1870 | Sic | Info | ||
| Bathyphantes parvulus (Westring, 1851) | It | Info | ||
| Centromerus pasquinii Brignoli, 1971 | It | Italian Endemic | Info | |
| Larinioides patagiatus (Clerck, 1757) | It / Sard | Info | ||
| Heliophanus patagiatus Thorell, 1875 | It | Info | ||
| Ozyptila patellibidens Levy, 1999 | Sic | Info | ||
| Leptoneta patrizii Roewer, 1953 | Sard | Italian Endemic | Info | |
| Sardostalita patrizii (Roewer, 1956) | Sard | Italian Endemic | Info | |
| Trichoncus patrizii Caporiacco, 1953 | It | Info | ||
| Eukoenenia patrizii Condé, 1956 | Sard | Italian Endemic | Info | |
| Buemarinoa patrizii Roewer, 1956 | Sard | Italian Endemic | Info | |
| Mitostoma patrizii Roewer, 1953 | Sard | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) patrizii patrizii Beier, 1953 | It | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) patrizii romanum Mahnert, 1980 | It | Italian Endemic | Info | |
| Argenna patula (Simon, 1874) | It / Sard / Sic | Info | ||
| Staveleya paulae (Simon, 1918) | It | Info | ||
| Alioranus pauper (Simon, 1881) | It | Info | ||
| Dicranolasma pauper Dahl, 1903 | It | Italian Endemic | Info | |
| Ozyptila pauxilla (Simon, 1870) | It / Sard | Info | ||
| Nemesia pavani Dresco, 1978 | It | Italian Endemic | Info | |
| Dysdera pavani Caporiacco, 1941 | It | Italian Endemic | Info | |
| Orchestina pavesii (Simon, 1873) | It / Sard | Info | ||
| Diplocephalus pavesii Pesarini, 1996 | It | Endemic | Info | |
| Troglohyphantes pavesii Pesarini, 1988 | It | Italian Endemic | Info | |
| Amaurobius pavesii Pesarini, 1991 | It | Italian Endemic | Info | |
| Plexippus paykulli (Audouin, 1826) | It / Sard / Sic | Introduced | Info | |
| Steatoda paykulliana (Walckenaer, 1806) | It / Sard / Sic | Info | ||
| Rhacochelifer peculiaris peculiaris (L. Koch, 1873) | It / Sard / Sic | Info | ||
| Nemesia pedemontana Decae, Pantini & Isaia, 2015 | It | Italian Endemic | Info | |
| Troglohyphantes pedemontanus (Gozo, 1908) | It | Italian Endemic | Info | |
| Acantholycosa pedestris (Simon, 1876) | It | Endemic | Info | |
| Trachyzelotes pedestris (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Cheiracanthium pelasgicum (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Beierochelifer peloponnesiacus peloponnesiacus (Beier, 1929) | It / Sard | Info | ||
| Neriene peltata (Wider, 1834) | It | Info | ||
| Moebelia penicillata (Westring, 1851) | It | Info | ||
| Attulus penicillatus (Simon, 1875) | It | Info | ||
| Cheiracanthium pennatum Simon, 1878 | It | Info | ||
| Cheiracanthium pennyi O. Pickard-Cambridge, 1873 | It / Sard | Info | ||
| Alopecosa pentheri (Nosek, 1905) | It | Info | ||
| Pseudeuophrys perdifumo van Helsdingen, 2015 | It | Italian Endemic | Info | |
| Leptorchestes peresi (Simon, 1868) | It | Info | ||
| Asthenargus perforatus Schenkel, 1929 | It | Info | ||
| Arctosa perita (Latreille, 1799) | It / Sard / Sic | Info | ||
| Arctosa personata (L. Koch, 1872) | It / Sard | Info | ||
| Amaurobius pesarinii Ballarin & Pantini, 2017 | It | Italian Endemic | Info | |
| Theridion petraeum L. Koch, 1872 | It | Info | ||
| Zelotes petrensis (C.L. Koch, 1839) | It / Sic | Info | ||
| Talavera petrensis (C.L. Koch, 1837) | It | Info | ||
| Hahnia petrobia Simon, 1875 | It | Info | ||
| Gnaphosa petrobia L. Koch, 1872 | It | Info | ||
| Palliduphantes petruzzielloi Bosmans & Trotta, 2021 | It | Italian Endemic | Info | |
| Mecopisthes peuceticus Caporiacco, 1951 | It | Italian Endemic | Info | |
| Pseudoblothrus peyerimhoffi (E. Simon, 1879) | It | Info | ||
| Pholcus phalangioides (Fuesslin, 1775) | It / Sard / Sic | Info | ||
| Asagena phalerata (Panzer, 1801) | It / Sard / Sic | Info | ||
| Minyriolus phaulobius (Thorell, 1875) | It | Info | ||
| Clubiona phragmitis C.L. Koch, 1843 | It / Sard | Info | ||
| Pityohyphantes phrygianus (C.L. Koch, 1836) | It / Sard | Info | ||
| Poecilochroa phyllobia (Thorell, 1871) | It | Info | ||
| Pseudicius picaceus (Simon, 1868) | It / Sic | Info | ||
| Atypus piceus (Sulzer, 1776) | It | Info | ||
| Diplocephalus picinus (Blackwall, 1841) | It | Info | ||
| Coelotes pickardi pastor Simon, 1875 | It | Endemic | Info | |
| Coelotes pickardi pickardi O. Pickard-Cambridge, 1873 | It | Endemic | Info | |
| Coelotes pickardi tirolensis (Kulczynski, 1906) | It | Endemic | Info | |
| Eratigena picta (Simon, 1870) | It | Info | ||
| Hahniharmia picta (Kulczynski, 1897) | It | Info | ||
| Theridion pictum (Walckenaer, 1802) | It / Sic | Info | ||
| Ephippiochthonius pieltaini (Beier, 1930) | It | Italian Endemic | Info | |
| Tmarus piger (Walckenaer, 1802) | It | Info | ||
| Withius piger (Simon, 1878) | It / Sard / Sic | Info | ||
| Harpactea piligera (Thorell, 1875) | It | Italian Endemic | Info | |
| Scotargus pilosus Simon, 1913 | It | Info | ||
| Lasiochernes pilosus (Ellingsen, 1910) | It | Info | ||
| Theridion pinastri L. Koch, 1872 | It / Sard / Sic | Info | ||
| Alopecosa pinetorum (Thorell, 1856) | It | Info | ||
| Platybunus pinetorum (C. L. Koch, 1839 ) | It | Info | ||
| Philodromus pinetorum Muster, 2009 | It | Info | ||
| Piniphantes pinicola (Simon, 1884) | It | Info | ||
| Tetragnatha pinicola L. Koch, 1870 | It | Info | ||
| Textrix pinicola Simon, 1875 | It / Sard | Info | ||
| Tmarus piochardi (Simon, 1866) | It / Sard | Info | ||
| Pirata piraticus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Trichoncoides piscator (Simon, 1884) | It | Info | ||
| Pirata piscatorius (Clerck, 1757) | It / Sard | Info | ||
| Chthonius pivai Gardini, 1991 | It | E | Info | |
| Oonops placidus Dalmas, 1916 | It / Sard | Endemic | Info | |
| Dolomedes plantarius (Clerck, 1757) | It / Sard | Info | ||
| Synema plorator (O. Pickard-Cambridge, 1872) | Sard | Info | ||
| Holocnemus pluchei (Scopoli, 1763) | It / Sard / Sic | Info | ||
| Berlandina plumalis (O. Pickard-Cambridge, 1872) | It / Sic | Info | ||
| Walckenaeria plumata Millidge, 1979 | It | Italian Endemic | Info | |
| Uloborus plumipes Lucas, 1846 | It / Sard / Sic | Info | ||
| Zelotes pluridentatus Marinaro, 1967 | Sic | Info | ||
| Troglohyphantes pluto Caporiacco, 1938 | It | Italian Endemic | Info | |
| Philodromus poecilus (Thorell, 1872) | It | Info | ||
| Globochthonius poeninus (Mahnert, 1975) | It | Info | ||
| Troglohyphantes poleneci Wiehle, 1964 | It | Endemic | Info | |
| Coelotes poleneci Wiehle, 1964 | It | Endemic | Info | |
| Linyphia polita Blackwall, 1870 | It | Info | ||
| Atemnus politus (Simon, 1878) | It / Sard / Sic | Info | ||
| Marpissa pomatia (Walckenaer, 1802) | It / Sard | Info | ||
| Dysdera pominii Caporiacco, 1947 | It | Italian Endemic | Info | |
| Ephippiochthonius poseidonis (Gardini, 1993) | Sard | Italian Endemic | Info | |
| Allochernes powelli (Kew, 1916) | It / Sard | Info | ||
| Coelotes poweri Simon, 1875 | It | Endemic | Info | |
| Neobisium (Neobisium) praecipuum (Simon, 1879) | It / Sard | Info | ||
| Tapinocyba praecox (O. Pickard-Cambridge, 1873) | It | Info | ||
| Philodromus praedatus O. Pickard-Cambridge, 1871 | It / Sard / Sic | Info | ||
| Drassyllus praeficus (L. Koch, 1866) | It / Sic | Info | ||
| Ozyptila praticola (C.L. Koch, 1837) | It / Sard | Info | ||
| Pardosa prativaga (L. Koch, 1870) | It / Sard | Info | ||
| Dysdera pristiphora Pesarini, 2001 | It | Italian Endemic | Info | |
| Diplocephalus procer (Simon, 1884) | It | Info | ||
| Baryphyma proclive (Simon, 1884) | It | Italian Endemic | Info | |
| Polenecia producta (Simon, 1873) | Sard | Info | ||
| Theridion prominens Blackwall, 1870 | Sic | Info | ||
| Cercidia prominens (Westring, 1851) | It / Sard | Info | ||
| Metopobactrus prominulus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Xysticus promiscuus O. Pickard-Cambridge, 1876 | Sic | Info | ||
| Lasaeola prona (Menge, 1868) | It | Info | ||
| Salticus propinquus Lucas, 1846 | It / Sard / Sic | Info | ||
| Diplocephalus protuberans (O. Pickard-Cambridge, 1875) | It | Info | ||
| Pardosa proxima (C.L. Koch, 1847) | It / Sard / Sic | Info | ||
| Agroeca proxima (O. Pickard-Cambridge, 1871) | It | Info | ||
| Araniella proxima (Kulczynski, 1885) | It | Info | ||
| Centromerus prudens (O. Pickard-Cambridge, 1873) | It | Info | ||
| Mansuphantes pseudoarciger (Wunderlich, 1985) | It | Endemic | Info | |
| Clubiona pseudoneglecta Wunderlich, 1994 | It | Info | ||
| Zodarion pseudonigriceps Bosmans & Pantini, 2019 | Sard | Italian Endemic | Info | |
| Agyneta pseudorurestris Wunderlich, 1980 | Sard | Info | ||
| Pardosa pseudostrigillata Tongiorgi, 1966 | It | Endemic | Info | |
| Drassodes pubescens (Thorell, 1856) | It / Sic | Info | ||
| Attulus pubescens (Fabricius, 1775) | It / Sard / Sic | Info | ||
| Centromerus puddui Brignoli, 1979 | Sard | Italian Endemic | Info | |
| Roncus puddui Mahnert, 1976 | Sard | Italian Endemic | Info | |
| Nigma puella (Simon, 1870) | It / Sard / Sic | Info | ||
| Anelosimus pulchellus (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Pulchellodromus pulchellus (Lucas, 1846) | It / Sard | Info | ||
| Oonops pulcher Templeton, 1835 | It | Info | ||
| Mughiphantes pulcher (Kulczynski, 1881) | It | Info | ||
| Mughiphantes pulcheroides (Wunderlich, 1985) | It | Endemic | Info | |
| Micaria pulicaria (Sundevall, 1831) | It / Sard | Info | ||
| Kaestneria pullata (O. Pickard-Cambridge, 1863) | It | Info | ||
| Pardosa pullata (Clerck, 1757) | It / Sard | Info | ||
| Ozyptila pullata (Thorell, 1875) | It | Info | ||
| Habrocestum pullatum Simon, 1876 | It | Info | ||
| Phrurolithus pullatus Kulczynski, 1897 | It | Info | ||
| Alopecosa pulverulenta (Clerck, 1757) | It / Sard / Sic | Info | ||
| Pocadicnemis pumila (Blackwall, 1841) | It | Info | ||
| Drassyllus pumilus (C.L. Koch, 1839) | It / Sic | Info | ||
| Dysdera punctata C. L. Koch, 1838 | It | Info | ||
| Lophomma punctatum (Blackwall, 1841) | It | Info | ||
| Cheiracanthium punctorium (Villers, 1789) | It / Sard | Info | ||
| Zelotes puritanus Chamberlin, 1922 | It | Info | ||
| Microlinyphia pusilla (Sundevall, 1830) | It / Sard / Sic | Info | ||
| Hahnia pusilla C.L. Koch, 1841 | It / Sard | Info | ||
| Dictyna pusilla Thorell, 1856 | It | Info | ||
| Staveleya pusilla (Menge, 1869) | It | Info | ||
| Minyriolus pusillus (Wider, 1834) | It | Info | ||
| Drassyllus pusillus (C.L. Koch, 1833) | It | Info | ||
| Zodarion pusio Simon, 1914 | It / Sard / Sic | Info | ||
| Segestria pusiola Simon, 1882 | Sic | Info | ||
| Hypsosinga pygmaea (Sundevall, 1831) | It / Sard / Sic | Info | ||
| Porrhomma pygmaeum (Blackwall, 1834) | It | Info | ||
| Civizelotes pygmaeus (Miller, 1943) | It | Info | ||
| Tapinocyboides pygmaeus (Menge, 1869) | It | Info | ||
| Chthonius pygmaeus Beier, 1951 | It | Info | ||
| Araneus quadratus Clerck, 1757 | It / Sard | Info | ||
| Titanoeca quadriguttata (Hahn, 1833) | It | Info | ||
| Pisaura quadrilineata (Lucas, 1838) | Sard / Sic | Info | ||
| Paranemastoma quadripunctatum (Perty, 1833) | It | Info | ||
| Scotophaeus quadripunctatus (Linnaeus, 1758) | It | Info | ||
| Euryopis quinqueguttata Thorell, 1875 | It / Sic | Info | ||
| Mizaga racovitzai (Fage, 1909) | It / Sic | Info | ||
| Neriene radiata (Walckenaer, 1841) | It | Info | ||
| Hogna radiata (Latreille, 1817) | It / Sard / Sic | Info | ||
| Marpissa radiata (Grube, 1859) | It | Info | ||
| Hogna radiata minor (Simon, 1876) | It | Info | ||
| Selenops radiatus Latreille, 1819 | Sic | Info | ||
| Pelecopsis radicicola (L. Koch, 1872) | It | Info | ||
| Agyneta ramosa Jackson, 1912 | It | Info | ||
| Oxyopes ramosus (Martini & Goeze, 1778) | It / Sic | Info | ||
| Chthonius raridentatus Hadži, 1930 | It | Info | ||
| Ozyptila rauda Simon, 1875 | It | Info | ||
| Ischyropsalis ravasinii Hadži, 1942 | It | Italian Endemic | Info | |
| Sauron rayi (Simon, 1881) | It | Info | ||
| Metatrachelas rayi (Simon, 1878) | It / Sard | Info | ||
| Neon rayi (Simon, 1875) | It | Info | ||
| Thanatus rayi Simon, 1875 | It | Info | ||
| Cybaeus raymondi (Simon, 1916) | Info | |||
| Nomisia recepta (Pavesi, 1880) | It / Sard / Sic | Info | ||
| Clubiona reclusa O. Pickard-Cambridge, 1863 | It | Info | ||
| Diplocentria rectangulata (Emerton, 1915) | It | Info | ||
| Mansuphantes rectilamellus (Deltshev, 1988) | It | Info | ||
| Nelima recurvipenis Martens, 1969 | It | Info | ||
| Agalenatea redii (Scopoli, 1763) | It / Sard / Sic | Info | ||
| Troglohyphantes regalini Pesarini, 1989 | It | Italian Endemic | Info | |
| Pseudoblothrus regalini Inzaghi, 1983 | It | Italian Endemic | Info | |
| Tetragnatha reimoseri (Rosca, 1939) | It | Info | ||
| Neobisium (Blothrus) reimoseri reimoseri (Beier, 1929) | It | Info | ||
| Leiobunum religiosum Simon, 1879 | It | Info | ||
| Erigone remota L. Koch, 1869 | It | Info | ||
| Zodarion remotum Denis, 1935 | It | Endemic | Info | |
| Arctosa renidescens Buchar & Thaler, 1995 | It | Endemic | Info | |
| Agyneta ressli (Wunderlich, 1973) | It | Info | ||
| Chthonius ressli Beier, 1956 | It | Info | ||
| Mesochelifer ressli Mahnert, 1981 | It | Info | ||
| Selamia reticulata (Simon, 1870) | Sard / Sic | Info | ||
| Neon reticulatus (Blackwall, 1853) | It | Info | ||
| Sintula retroversus (O. Pickard-Cambridge, 1875) | It / Sard | Info | ||
| Oedothorax retusus (Westring, 1851) | It | Info | ||
| Scotophaeus retusus (Simon, 1878) | It | Info | ||
| Silometopus reussi (Thorell, 1871) | It | Info | ||
| Gnaphosa rhenana Müller & Schenkel, 1895 | It | Info | ||
| Megabunus rhinoceros (Canestrini, 1872) | It | Info | ||
| Haplodrassus rhodanicus (Simon, 1914) | Sard | Info | ||
| Zelotes rinske van Helsdingen, 2012 | It | Italian Endemic | Info | |
| Cryptachaea riparia (Blackwall, 1834) | It / Sard | Info | ||
| Pardosa riparia (C.L. Koch, 1833) | It | Info | ||
| Sitticus rivalis Simon, 1937 | It | Info | ||
| Palliduphantes robertsi Ballarin & Pantini, 2022 | It | Italian Endemic | Info | |
| Trochosa robusta (Simon, 1876) | It | Info | ||
| Leptorhoptrum robustum (Westring, 1851) | It | Info | ||
| Bassaniodes robustus (Hahn, 1832) | It | Info | ||
| Dysdera romana Gasparo & Di Franco, 2008 | It | Italian Endemic | Info | |
| Parachtes romandiolae (Caporiacco, 1949) | It | Italian Endemic | Info | |
| Styloctetor romanus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Pardosa roscai (Roewer, 1951) | It | Info | ||
| Eukoenenia roscia Christian, 2014 | It | Italian Endemic | Info | |
| Silometopus rosemariae Wunderlich, 1969 | It | Info | ||
| Porrhomma rosenhaueri (L. Koch, 1872) | It | Info | ||
| Leiobunum roseum C. L. Koch, 1839 | It | Info | ||
| Micaria rossica Thorell, 1875 | It | Info | ||
| Mansuphantes rossii (Caporiacco, 1927) | It | Italian Endemic | Info | |
| Hahnia rossii Brignoli, 1977 | It | Info | ||
| Rhomphaea rostrata (Simon, 1873) | It / Sic | Info | ||
| Diplocephalus rostratus Schenkel, 1934 | It | Endemic | Info | |
| Leiobunum rotundum (Latreille, 1798) | It | Info | ||
| Gonatium rubellum (Blackwall, 1841) | It | Info | ||
| Gonatium rubens (Blackwall, 1833) | It | Info | ||
| Harpactea rubicunda (C.L. Koch, 1838) | It | Info | ||
| Zodarion rubidum Simon, 1914 | It | Info | ||
| Drassodes rubidus (Simon, 1878) | Sard | Info | ||
| Hygrolycosa rubrofasciata (Ohlert, 1865) | It | Info | ||
| Textrix rubrofoliata Pesarini, 1990 | It / Sic | Info | ||
| Dendryphantes rudis (Sundevall, 1833) | It | Info | ||
| Coelotes rudolfi (Schenkel, 1925) | It | Endemic | Info | |
| Loxosceles rufescens (Dufour, 1820) | It / Sard / Sic | Info | ||
| Troglohyphantes ruffoi Caporiacco, 1936 | It | Italian Endemic | Info | |
| Amaurobius ruffoi Thaler, 1990 | It | Italian Endemic | Info | |
| Clubiona ruffoi Caporiacco, 1940 | It | Info | ||
| Zodarion ruffoi Caporiacco, 1951 | It / Sard | Endemic | Info | |
| Neobisium (Neobisium) ruffoi Beier, 1958 | It | Italian Endemic | Info | |
| Acanthocreagris ruffoi (Lazzeroni, 1969) | It | Info | ||
| Euophrys rufibarbis (Simon, 1868) | It / Sard / Sic | Info | ||
| Eresus ruficapillus C.L. Koch, 1846 | It / Sard / Sic | Info | ||
| Pulchellodromus ruficapillus (Simon, 1885) | It | Info | ||
| Ballus rufipes (Simon, 1868) | It / Sic | Info | ||
| Gongylidium rufipes (Linnaeus, 1758) | It | Info | ||
| Nesticodes rufipes (Lucas, 1846) | It / Sic | Introduced | Info | |
| Haplodrassus rufipes (Lucas, 1846) | It / Sard / Sic | Info | ||
| Anelasmocephalus rufitarsis Simon, 1879 | It | Info | ||
| Ouedia rufithorax (Simon, 1881) | It / Sard / Sic | Info | ||
| Heliophanus rufithorax Simon, 1868 | It / Sard / Sic | Info | ||
| Gnaphosa rufula (L. Koch, 1866) | Sic | Info | ||
| Macrargus rufus (Wider, 1834) | It | Info | ||
| Philodromus rufus Walckenaer, 1826 | It / Sard / Sic | Info | ||
| Dysdera rullii Pesarini, 2001 | It | Italian Endemic | Info | |
| Leiobunum rupestre (Herbst, 1799) | It | Info | ||
| Pimoa rupicola (Simon, 1884) | It | Endemic | Info | |
| Liocranum rupicola (Walckenaer, 1830) | It / Sard | Info | ||
| Attulus rupicola (C.L. Koch, 1837) | It | Info | ||
| Pyrenecosa rupicola (Dufour, 1821) | It | Info | ||
| Agyneta rurestris (C.L. Koch, 1836) | It / Sic | Info | ||
| Trochosa ruricola (De Geer, 1778) | It / Sard / Sic | Info | ||
| Urozelotes rusticus (L. Koch, 1872) | It / Sard / Sic | Introduced | Info | |
| Drapeta rutilans (Thorell, 1875) | It | Info | ||
| Mitostoma sabbadinii Tedeschi & Sciaky 1997 | Sard | Italian Endemic | Info | |
| Anyphaena sabina L. Koch, 1866 | It / Sard / Sic | Info | ||
| Psammitis sabulosa (Hahn, 1832) | It | Info | ||
| Thanatus sabulosus (Menge, 1875) | It | Info | ||
| Araneus saevus (L. Koch, 1872) | It | Info | ||
| Pritha sagittata Legittimo, Simeon, Di Pompeo & Kulczycki, 2017 | It | Info | ||
| Euscorpius (Euscorpius) salentinus Tropea, 2017 | It | Italian Endemic | Info | |
| Palliduphantes salfii (Dresco, 1949) | It | Italian Endemic | Info | |
| Pseudomogrus salsicola (Simon, 1937) | Sic | Info | ||
| Pardosa saltans Töpfer-Hofmann, 2000 | It | Info | ||
| Attulus saltator (O. Pickard-Cambridge, 1868) | It | Info | ||
| Ozyptila salustri Wunderlich, 2011 | It | Italian Endemic | Info | |
| Harpactea salvatorei Platania & Arnedo, 2020 | It | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) samniticum Mahnert, 1980 | It | Italian Endemic | Info | |
| Harpactea sanctidomini Gasparo, 1997 | It | Italian Endemic | Info | |
| Ozyptila sanctuaria (O. Pickard-Cambridge, 1871) | It / Sard / Sic | Info | ||
| Eresus sandaliatus (Martini & Goeze, 1778) | It | Info | ||
| Acanthocreagris sandaliotica Callaini, 1986 | Sard | Italian Endemic | Info | |
| Roncus sandalioticus Gardini, 1982 | Sard | Italian Endemic | Info | |
| Hypsosinga sanguinea (C.L. Koch, 1844) | It / Sard / Sic | Info | ||
| Nematogmus sanguinolentus (Walckenaer, 1841) | It / Sard | Info | ||
| Typhlonesticus santinellii Isaia & Ribera, 2023 | It | Italian Endemic | Info | |
| Nemesia sanzoi Fage, 1917 | It / Sic | Italian Endemic | Info | |
| Notioscopus sarcinatus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Acartauchenius sardiniensis Wunderlich, 1995 | Sard | Italian Endemic | Info | |
| Bassaniodes sardiniensis (Wunderlich, 1995) | Sard | Italian Endemic | Info | |
| Harpactea sardoa Alicata, 1966 | It / Sard | Italian Endemic | Info | |
| Eratigena sardoa (Brignoli, 1977) | Sard | Italian Endemic | Info | |
| Acanthocreagris sardoa (Beier, 1959) | Sard | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) sardoum Beier, 1956 | Sard | Italian Endemic | Info | |
| Tenuiphantes sardous (Gozo, 1908) | Sard | Italian Endemic | Info | |
| Spelyngochthonius sardous Beier, 1955 | Sard | Italian Endemic | Info | |
| Roncus sardous Beier, 1955 | Sard | Italian Endemic | Info | |
| Ephippiochthonius sardous Gardini, 2008 | Sard | Italian Endemic | Info | |
| Zodarion sardum Bosmans, 1997 | Sard | Italian Endemic | Info | |
| Metasclerosoma sardum (Thorell, 1876) | Sard | Italian Endemic | Info | |
| Cybaeodes sardus Platnick & Di Franco, 1992 | Sard | Italian Endemic | Info | |
| Zelotes sardus (Canestrini, 1873) | It / Sard | Endemic | Info | |
| Typhochrestus sardus Bosmans, 2008 | Sard | Italian Endemic | Info | |
| Pardosa saturatior Simon, 1937 | It | Info | ||
| Centromerus satyrus (Simon, 1884) | It | Info | ||
| Synaphosus sauvage Ovtsharenko, Levy & Platnick, 1994 | Sic | Info | ||
| Cteniza sauvagesi (Rossi, 1788) | It / Sard / Sic | Endemic | Info | |
| Agyneta saxatilis (Blackwall, 1844) | It / Sic | Info | ||
| Clubiona saxatilis L. Koch, 1867 | It | Info | ||
| Opilio saxatilis C. L. Koch, 1839 | It | Info | ||
| Caviphantes saxetorum (Hull, 1916) | It | Info | ||
| Sittisax saxicola (C.L. Koch, 1846) | It | Info | ||
| Trichoncus saxicola (O. Pickard-Cambridge, 1861) | It | Info | ||
| Domitius sbordonii (Brignoli, 1979) | It | Italian Endemic | Info | |
| Troglohyphantes sbordonii Brignoli, 1975 | It | Endemic | Info | |
| Tegenaria sbordonii Brignoli, 1971 | It | Italian Endemic | Info | |
| Ozyptila scabricula (Westring, 1851) | It | Info | ||
| Troxochrus scabriculus (Westring, 1851) | It | Info | ||
| Crustulina scabripes Simon, 1881 | It / Sard / Sic | Info | ||
| Ceratinella scabrosa (O. Pickard-Cambridge, 1871) | It / Sic | Info | ||
| Dicranolasma scabrum (Herbst, 1798) | It | Info | ||
| Salticus scenicus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Aelurillus schembrii Cantarella, 1982 | It / Sic | Info | ||
| Pardosa schenkeli Lessert, 1904 | It | Info | ||
| Saccarella schilleri Schönhofer & Martens, 2012 | It | Italian Endemic | Info | |
| Callilepis schuszteri (Herman, 1879) | It | Info | ||
| Troglohyphantes sciakyi Pesarini, 1989 | It | Italian Endemic | Info | |
| Troglohyphantes scientificus Deeleman-Reinhold, 1978 | It | Endemic | Info | |
| Salticus scitulus (Simon, 1868) | Sic | Info | ||
| Larinioides sclopetarius (Clerck, 1757) | It / Sic | Info | ||
| Allomengea scopigera (Grube, 1859) | It | Info | ||
| Amaurobius scopolii Thorell, 1871 | It | Endemic | Info | |
| Pselaphochernes scorpioides (Hermann, 1804) | It / Sard / Sic | Info | ||
| Robertus scoticus Jackson, 1914 | It | Info | ||
| Trichoncus scrofa Simon, 1884 | It | Info | ||
| Zelotes scrutatus (O. Pickard-Cambridge, 1872) | Sic | Info | ||
| Acartauchenius scurrilis (O. Pickard-Cambridge, 1873) | It | Info | ||
| Scotophaeus scutulatus (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Psammitis secedens (L. Koch, 1876) | It | Info | ||
| Ozyptila secreta Thaler, 1987 | It | Endemic | Info | |
| Haplodrassus securifer Bosmans & Abrous, 2018 | It / Sard / Sic | Info | ||
| Pireneitega segestriformis (Dufour, 1820) | Info | |||
| Metellina segmentata (Clerck, 1757) | It / Sard / Sic | Info | ||
| Zelotes segrex (Simon, 1878) | It / Sic | Info | ||
| Cheiracanthium seidlitzi L. Koch, 1864 | It / Sard / Sic | Info | ||
| Centromerus sellarius (Simon, 1884) | It | Info | ||
| Centromerus semiater (L. Koch, 1879) | It | Info | ||
| Singa semiatra L. Koch, 1867 | It / Sic | Info | ||
| Menemerus semilimbatus (Hahn, 1829) | It / Sard / Sic | Info | ||
| Theridion semitinctum Simon, 1914 | It | Info | ||
| Nelima sempronii Szalay, 1951 | It | Info | ||
| Poecilochroa senilis (O. Pickard-Cambridge, 1872) | Sic | Info | ||
| Spermophora senoculata (Dugès, 1836) | It / Sard / Sic | Introduced | Info | |
| Segestria senoculata (Linnaeus, 1758) | It / Sard / Sic | Info | ||
| Leptoneta serbariuana Roewer, 1953 | Sard | Italian Endemic | Info | |
| Harpactea serena (Simon, 1907) | It | Info | ||
| Acanthocreagris serianii Gardini, 1998 | It | Italian Endemic | Info | |
| Pellenes seriatus (Thorell, 1875) | It / Sic | Info | ||
| Drassodes serratichelis (Roewer, 1928) | Sard | Info | ||
| Centromerus serratus (O. Pickard-Cambridge, 1875) | It / Sic | Info | ||
| Glyphesis servulus (Simon, 1881) | It | Info | ||
| Bathyphantes setiger F.O. Pickard-Cambridge, 1894 | It | Info | ||
| Orchestina setosa Dalmas, 1916 | Sard | Info | ||
| Euryopis sexalbomaculata (Lucas, 1846) | It | Info | ||
| Glyptogona sextuberculata (Keyserling, 1863) | It | Info | ||
| Dysdera shardana Opatova & Arnedo, 2009 | Sard | Italian Endemic | Info | |
| Dysdera sibyllinica Kritscher, 1956 | It | Italian Endemic | Info | |
| Eratigena sicana (Brignoli, 1976) | Sard / Sic | Italian Endemic | Info | |
| Araeoncus sicanus Brignoli, 1979 | Sic | Italian Endemic | Info | |
| Euscorpius (Euscorpius) sicanus (C.L. Koch, 1837) | Sic | Italian Endemic | Info | |
| Xysticus siciliensis Wunderlich, 1995 | It / Sic | Italian Endemic | Info | |
| Allochernes siciliensis (Beier, 1963) | It / Sard / Sic | Info | ||
| Harpactea sicula Alicata, 1966 | Sic | Italian Endemic | Info | |
| Metasclerosoma siculum Marcellino, 1970 | Sic | Italian Endemic | Info | |
| Parachtes siculus (Caporiacco, 1949) | It / Sic | Italian Endemic | Info | |
| Zelotes siculus (Simon, 1878) | Sic | Italian Endemic | Info | |
| Pellenes siculus Alicata & Cantarella, 2000 | Sic | Italian Endemic | Info | |
| Ephippiochthonius siculus (Beier, 1961) | It / Sard / Sic | Italian Endemic | Info | |
| Roncus siculus Beier, 1963 | Sic | Italian Endemic | Info | |
| Lasiochernes siculus Beier, 1961 | It / Sic | Italian Endemic | Info | |
| Zaragozachthonius siculus Gardini, 2020 | Sic | Italian Endemic | Info | |
| Cyclosa sierrae Simon, 1870 | It / Sard | Info | ||
| Alpiscorpius (Balkanscorpius) sigma Kovařík, Štundlová, Fet & Šťáhlavský, 2019 | It | Endemic | Info | |
| Haplodrassus signifer (C.L. Koch, 1839) | It / Sard / Sic | Info | ||
| Dysdera silana Alicata, 1965 | It | Italian Endemic | Info | |
| Micaria silesiaca L. Koch, 1875 | It | Info | ||
| Mecopisthes silus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Tegenaria silvestris L. Koch, 1872 | It | Info | ||
| Haplodrassus silvestris (Blackwall, 1833) | It | Info | ||
| Zora silvestris Kulczynski, 1897 | It | Info | ||
| Crosbyarachne silvestris (Georgescu, 1973) | It | Info | ||
| Cryphoeca silvicola (C.L. Koch, 1834) | It | Info | ||
| Centromerus silvicola (Kulczynski, 1887) | It | Info | ||
| Nuctenea silvicultrix (C.L. Koch, 1835) | It | Info | ||
| Simitidion simile (C.L. Koch, 1836) | It / Sard / Sic | Info | ||
| Neobisium (Neobisium) simile (L. Koch, 1873) | It / Sic | Info | ||
| Bathyphantes similis Kulczynski, 1894 | It | Info | ||
| Clubiona similis L. Koch, 1867 | It | Info | ||
| Zelotes similis (Kulczynski, 1887) | It | Info | ||
| Amaurobius similis (Blackwall, 1861) | It / Sic | Introduced | Info | |
| Troglohyphantes similis Fage, 1919 | It | Info | ||
| Arctosa similis Schenkel, 1938 | It / Sard / Sic | Info | ||
| Nemesia simoni O. Pickard-Cambridge, 1874 | It | Info | ||
| Psilochorus simoni (Berland, 1911) | It / Sard | Introduced | Info | |
| Orchestina simoni Dalmas, 1916 | It / Sard | Info | ||
| Comaroma simoni Bertkau, 1889 | It | Info | ||
| Mansuphantes simoni (Kulczynski, 1894) | It | Info | ||
| Trichoncyboides simoni (Lessert, 1904) | It | Info | ||
| Typhochrestus simoni Lessert, 1907 | It | Info | ||
| Alopecosa simoni (Thorell, 1872) | It | Info | ||
| Drassodex simoni Hervé, Roberts & Murphy, 2009 | It | Endemic | Info | |
| Sabacon simoni Dresco, 1952 | It | Info | ||
| Neobisium (Neobisium) simoni petzi Beier, 1939 | It | Info | ||
| Neobisium (Neobisium) simoni simoni (L. Koch, 1873) | It | Info | ||
| Singa simoniana Costa, 1885 | Sard | Info | ||
| Erigonoplus simplex Millidge, 1979 | It | Info | ||
| Setaphis simplex (Simon, 1885) | It | Info | ||
| Ozyptila simplex (O. Pickard-Cambridge, 1862) | It | Info | ||
| Heliophanus simplex Simon, 1868 | It | Info | ||
| Agyneta simplicitarsis (Simon, 1884) | It | Info | ||
| Parasteatoda simulans (Thorell, 1875) | It | Info | ||
| Paraliochthonius singularis (Menozzi, 1924) | It / Sard / Sic | Info | ||
| Pterotricha sinoniae Caporiacco, 1953 | It | Info | ||
| Histopona sinuata (Kulczynski, 1897) | It | Info | ||
| Calathocratus sinuosus (Soerensen, 1873) | It | Italian Endemic | Info | |
| Phylloneta sisyphia (Clerck, 1757) | It / Sard / Sic | Info | ||
| Micaria sociabilis Kulczynski, 1897 | It | Info | ||
| Drapetisca socialis (Sundevall, 1833) | It | Info | ||
| Haplodrassus soerenseni (Strand, 1900) | It | Info | ||
| Dicranolasma soerenseni Thorell, 1876 | It / Sard / Sic | Info | ||
| Allochernes solarii (Simon, 1898) | It / Sard | Info | ||
| Alopecosa solitaria (Herman, 1879) | It | Info | ||
| Coelotes solitarius L. Koch, 1868 | It | Info | ||
| Civizelotes solstitialis (Levy, 1998) | Sard | Info | ||
| Troglohyphantes sordellii (Pavesi, 1875) | It | Endemic | Info | |
| Pardosa sordidata (Thorell, 1875) | It | Info | ||
| Trichoncus sordidus Simon, 1884 | It | Info | ||
| Aterigena soriculata (Simon, 1873) | Sard | Endemic | Info | |
| Gongylidium soror Thaler, 1993 | It | Italian Endemic | Info | |
| Erigone spadix Thorell, 1875 | It | Info | ||
| Troglohyphantes spatulifer Pesarini, 2001 | It | Italian Endemic | Info | |
| Donacochara speciosa (Thorell, 1875) | It | Info | ||
| Eukoenenia spelaea hauseri Condé, 1974 | It | Endemic | Info | |
| Eukoenenia spelaea spelaea Peyerimhoff, 1902 | It | Endemic | Info | |
| Globochthonius spelaeophilus (Beier, 1931) | It | Info | ||
| Neobisium (Blothrus) spelaeum istriacum (G. Müller, 1931) | It | Info | ||
| Domitius speluncarum (Pavesi, 1873) | It | Endemic | Info | |
| Paraleptoneta spinimana (Simon, 1884) | It / Sard / Sic | Info | ||
| Zoropsis spinimana (Dufour, 1820) | It / Sard / Sic | Info | ||
| Zora spinimana (Sundevall, 1833) | It / Sard | Info | ||
| Trochosa spinipalpis (F.O. Pickard-Cambridge, 1895) | It | Info | ||
| Odiellus spinosus (Bosc, 1792) | It / Sic | Info | ||
| Hysterochelifer spinosus (Beier, 1928) | Sard / Sic | Info | ||
| Clubiona stagnatilis Kulczynski, 1897 | It | Info | ||
| Tmarus staintoni (O. Pickard-Cambridge, 1873) | It / Sard | Info | ||
| Chthonius stammeri Beier, 1942 | It | Italian Endemic | Info | |
| Euscorpius (Euscorpius) stefaniae Tropea & Parmakelis, 2022 | It | Italian Endemic | Info | |
| Tmarus stellio Simon, 1875 | It | Info | ||
| Crustulina sticta (O. Pickard-Cambridge, 1861) | It | Info | ||
| Lathys stigmatisata (Menge, 1869) | It | Info | ||
| Arctosa stigmosa (Thorell, 1875) | It | Info | ||
| Harpactea strandi (Caporiacco, 1939) | It | Italian Endemic | Info | |
| Talanites strandi Spassky, 1940 | It | Info | ||
| Ischyropsalis strandi Kratochvil, 1936 | It | Italian Endemic | Info | |
| Liocranoeca striata (Kulczynski, 1882) | It | Info | ||
| Tetragnatha striata L. Koch, 1862 | It | Info | ||
| Alopecosa striatipes (C.L. Koch, 1839) | It | Info | ||
| Spiracme striatipes (L. Koch, 1870) | It | Info | ||
| Thanatus striatus C.L. Koch, 1845 | It | Info | ||
| Eukoenenia strinatii Condé, 1977 | It | Italian Endemic | Info | |
| Cheiracanthium striolatum Simon, 1878 | It / Sard | Info | ||
| Leviellus stroemi (Thorell, 1870) | It | Info | ||
| Araneus sturmi (Hahn, 1831) | It | Info | ||
| Roncus stussineri (Simon, 1881) | It | Info | ||
| Walckenaeria stylifrons (O. Pickard-Cambridge, 1875) | It / Sard | Info | ||
| Neottiura suaveolens (Simon, 1880) | It | Info | ||
| Micrargus subaequalis (Westring, 1851) | It / Sard | Info | ||
| Centromerus subalpinus Lessert, 1907 | It | Info | ||
| Troglohyphantes subalpinus Thaler, 1967 | It | Endemic | Info | |
| Eukoenenia subangusta Silvestri, 1903 | It | Info | ||
| Centromerus subcaecus Kulczynski, 1914 | It | Info | ||
| Synageles subcingulatus (Simon, 1878) | It | Info | ||
| Erigonella subelevata (L. Koch, 1869) | It | Info | ||
| Neoscona subfusca (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Icius subinermis Simon, 1937 | It / Sard / Sic | Info | ||
| Microctenonyx subitaneus (O. Pickard-Cambridge, 1875) | It / Sard | Info | ||
| Neobisium (Neobisium) sublaeve (E. Simon, 1879) | Sard | Info | ||
| Maro sublestus Falconer, 1915 | It | Info | ||
| Chthonius submontanus Beier, 1963 | It | Info | ||
| Argenna subnigra (O. Pickard-Cambridge, 1861) | It | Info | ||
| Dysdera subnubila Simon, 1907 | Sic | Info | ||
| Micaria subopaca Westring, 1861 | It | Info | ||
| Dysdera subsquarrosa Simon, 1914 | It | Info | ||
| Clubiona subsultans Thorell, 1875 | It / Sard | Info | ||
| Zelotes subterraneus (C.L. Koch, 1833) | It | Info | ||
| Agyneta subtilis (O. Pickard-Cambridge, 1863) | It | Info | ||
| Clubiona subtilis L. Koch, 1867 | It | Info | ||
| Centromerus succinus (Simon, 1884) | It / Sard | Info | ||
| Microbisium suecicum Lohmander, 1945 | It | Info | ||
| Euophrys sulphurea (L. Koch, 1867) | It / Sard / Sic | Info | ||
| Ephippiochthonius sulphureus Gardini, 2013 | It | Italian Endemic | Info | |
| Alopecosa sulzeri (Pavesi, 1873) | It | Info | ||
| Maso sundevalli (Westring, 1851) | It | Info | ||
| Larinioides suspicax (O. Pickard-Cambridge, 1876) | It / Sard / Sic | Info | ||
| Neobisium (Neobisium) sylvaticum (C.L. Koch, 1835) | It | Info | ||
| Centromerus sylvaticus (Blackwall, 1841) | It | Info | ||
| Stalita taenaria Schiödte, 1847 | It | Endemic | Info | |
| Alopecosa taeniata (C.L. Koch, 1835) | It | Info | ||
| Menemerus taeniatus (L. Koch, 1867) | It / Sic | Info | ||
| Dasumia taeniifera Thorell, 1875 | It | Endemic | Info | |
| Zelotes talpinus (L. Koch, 1872) | It | Info | ||
| Sibianor tantulus (Simon, 1868) | It | Info | ||
| Leptoneta taramellii Roewer, 1956 | Sard | Italian Endemic | Info | |
| Lycosa tarantula (Linnaeus, 1758) | It / Sard / Sic | Info | ||
| Lycosa tarantula carsica Caporiacco, 1949 | It | Info | ||
| Phalangium targionii (Canestrini, 1872) | Sard / Sic | Info | ||
| Pardosa tatarica (Thorell, 1875) | It / Sard / Sic | Info | ||
| Oreoneta tatrica (Kulczynski, 1915) | It | Info | ||
| Panamomops tauricornis (Simon, 1881) | It | Info | ||
| Saitis tauricus Kulczyński, 1904 | It | Info | ||
| Tenuiphantes tenebricola (Wider, 1834) | It / Sard | Info | ||
| Mesiotelus tenellus (Thorell, 1875) | It | Italian Endemic | Info | |
| Anelasmocephalus tenuiglandis Martens & Chemini, 1988 | It | Info | ||
| Erigone tenuimana Simon, 1884 | It | Endemic | Info | |
| Linyphia tenuipalpis Simon, 1884 | It / Sic | Info | ||
| Pardosa tenuipes L. Koch, 1882 | It | Info | ||
| Tenuiphantes tenuis (Blackwall, 1852) | It / Sard / Sic | Info | ||
| Zelotes tenuis (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Chthonius tenuis L. Koch, 1873 | It / Sard / Sic | Info | ||
| Mesiotelus tenuissimus (L. Koch, 1866) | It / Sard / Sic | Info | ||
| Pirata tenuitarsis Simon, 1876 | It / Sard | Info | ||
| Parasteatoda tepidariorum (C.L. Koch, 1841) | It / Sard | Introduced | Info | |
| Attulus terebratus (Clerck, 1757) | It | Info | ||
| Harpactea tergestina Gasparo, 2014 | It | Italian Endemic | Info | |
| Euscorpius (Euscorpius) tergestinus (C.L. Koch, 1837) | It | Info | ||
| Pachygnatha terilis Thaler, 1991 | It | Info | ||
| Ipa terrenus (L. Koch, 1879) | It | Info | ||
| Clubiona terrestris Westring, 1851 | It / Sard / Sic | Info | ||
| Euophrys terrestris (Simon, 1871) | It / Sard | Info | ||
| Coelotes terrestris (Wider, 1834) | It | Info | ||
| Trochosa terricola Thorell, 1856 | It / Sard / Sic | Info | ||
| Scotolemon terricola Simon, 1872 | Sard | Info | ||
| Enoplognatha testacea Simon, 1884 | It / Sard | Info | ||
| Lasaeola testaceomarginata Simon, 1881 | Sard / Sic | Info | ||
| Euophrys testaceozonata Caporiacco, 1922 | It | Info | ||
| Rhode testudinea Pesarini, 1984 | It | Italian Endemic | Info | |
| Ephippiochthonius tetrachelatus (Preyssler, 1790) | It / Sard / Sic | Info | ||
| Cybaeus tetricus (C.L. Koch, 1839) | It | Info | ||
| Harpactea thaleri Alicata, 1966 | It | Endemic | Info | |
| Cortestina thaleri Knoflach, 2009 | It | Endemic | Info | |
| Drassodes thaleri Hervé, 2009 | It | Endemic | Info | |
| Occidenchthonius thaleri Gardini, 2009 | It | Italian Endemic | Info | |
| Episinus theridioides Simon, 1873 | Sard | Info | ||
| Scytodes thoracica (Latreille, 1802) | It / Sard / Sic | Info | ||
| Enoplognatha thoracica (Hahn, 1833) | It / Sard / Sic | Info | ||
| Labulla thoracica (Wider, 1834) | It | Info | ||
| Trichopternoides thorelli (Westring, 1861) | It | Info | ||
| Leviellus thorelli (Ausserer, 1871) | It | Info | ||
| Diplocephalus tiberinus (Caporiacco, 1936) | It | Italian Endemic | Info | |
| Gnaphosa tigrina Simon, 1878 | It / Sic | Info | ||
| Platnickina tincta (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Trogulus tingiformis C. L. Koch, 1848 | It | Info | ||
| Erigone tirolensis L. Koch, 1872 | It | Info | ||
| Wiehlenarius tirolensis (Schenkel, 1939) | It | Info | ||
| Gyas titanus Simon, 1879 | It | Info | ||
| Centromerus tongiorgii Ballarin & Pantini, 2020 | It | Italian Endemic | Info | |
| Histopona torpida (C.L. Koch, 1837) | It | Info | ||
| Neobisium (Blothrus) torrei (Simon, 1881) | It | Italian Endemic | Info | |
| Pardosa torrentum Simon, 1876 | It | Info | ||
| Xysticus tortuosus Simon, 1932 | Sic | Info | ||
| Dipoena torva (Thorell, 1875) | It / Sard | Info | ||
| Diplocephalus toscanaensis Wunderlich, 2011 | It | Info | ||
| Alopecosa trabalis (Clerck, 1757) | It | Info | ||
| Nemesia transalpina (Doleschall, 1871) | It | Italian Endemic | Info | |
| Opilio transversalis Roewer, 1956 | It | Info | ||
| Latrodectus tredecimguttatus (Rossi, 1790) | It / Sard / Sic | Info | ||
| Euscorpius (Euscorpius) trejaensis Tropea & Parmakelis, 2022 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) trentinum ghidinii Beier, 1942 | It | Italian Endemic | Info | |
| Neobisium (Neobisium) trentinum trentinum Beier, 1931 | It | Info | ||
| Linyphia triangularis (Clerck, 1757) | It / Sard / Sic | Info | ||
| Rilaena triangularis (Herbst, 1799) | It | Info | ||
| Steatoda triangulosa (Walckenaer, 1802) | It / Sard / Sic | Info | ||
| Heliophanus tribulosus Simon, 1868 | It / Sard / Sic | Info | ||
| Trogulus tricarinatus (Linnaeus, 1767) | It | Info | ||
| Ebrechtella tricuspidata (Fabricius, 1775) | It | Info | ||
| Oligolophus tridens (C. L. Koch, 1836) | It | Info | ||
| Tegenaria tridentina L. Koch, 1872 | It | Endemic | Info | |
| Centromerus tridentinus Caporiacco, 1952 | It | Info | ||
| Argiope trifasciata (Forsskål, 1775) | It / Sard / Sic | Introduced | Info | |
| Aphantaulax trifasciata trifasciata (O. Pickard-Cambridge, 1872) | It / Sard / Sic | Info | ||
| Aphantaulax trifasciata trimaculata Simon, 1878 | It | Info | ||
| Baryphyma trifrons (O. Pickard-Cambridge, 1863) | It | Info | ||
| Mughiphantes triglavensis (Miller & Polenec, 1975) | It | Endemic | Info | |
| Araneus triguttatus (Fabricius, 1775) | It / Sic | Info | ||
| Mermessus trilobatus (Emerton, 1882) | It | Introduced | Info | |
| Oecobius trimaculatus O. Pickard-Cambridge, 1872 | Sic | Info | ||
| Buthus trinacrius Lourenco et Rossi, 2013 | Sic | Italian Endemic | Info | |
| Micaria tripunctata Holm, 1978 | It | Info | ||
| Pellenes tripunctatus (Walckenaer, 1802) | It | Info | ||
| Nemastoma triste (C.L. Koch, 1835) | It | Info | ||
| Lasaeola tristis (Hahn, 1833) | It / Sard | Info | ||
| Titanoeca tristis L. Koch, 1872 | It / Sic | Info | ||
| Clubiona trivialis C.L. Koch, 1843 | It | Info | ||
| Ephippiochthonius troglophilus (Beier, 1930) | It | Italian Endemic | Info | |
| Roncus troglophilus Beier, 1931 | It | Italian Endemic | Info | |
| Sardoscorpius troglophilus Tropea & Onnis, 2020 | Sard | Italian Endemic | Info | |
| Odiellus troguloides (Lucas, 1846) | It | Info | ||
| Episinus truncatus Latreille, 1809 | It / Sard / Sic | Info | ||
| Pistius truncatus (Pallas, 1772) | It / Sard / Sic | Info | ||
| Robertus truncorum (L. Koch, 1872) | It | Info | ||
| Ozyptila trux (Blackwall, 1846) | It | Info | ||
| Ero tuberculata (De Geer, 1778) | It / Sard / Sic | Info | ||
| Roncus tuberculatus Gardini, 1991 | It | Italian Endemic | Info | |
| Hysterochelifer tuberculatus tuberculatus (Lucas, 1849) | It / Sard / Sic | Info | ||
| Mastobunus tuberculifer (Lucas, 1846) | Sic | Info | ||
| Oonops tubulatus Dalmas, 1916 | It | Info | ||
| Ischnocolus tunetanus Pavesi, 1880 | Sic | Info | ||
| Roncus turritanus Gardini, 1982 | Sard | Italian Endemic | Info | |
| Anelasmocephalus tuscus Martens & Chemini, 1988 | It | Italian Endemic | Info | |
| Haplodrassus typhon (Simon, 1878) | Sard | Info | ||
| Tegenaria tyrrhenica Dalmas, 1922 | It | Italian Endemic | Info | |
| Ephippiochthonius tyrrhenicus Gardini, 2013 | Info | |||
| Piratula uliginosa (Thorell, 1856) | It | Info | ||
| Gibbaranea ullrichi (Hahn, 1835) | It | Info | ||
| Xysticus ulmi (Hahn, 1831) | It | Info | ||
| Nuctenea umbratica (Clerck, 1757) | It / Sic | Info | ||
| Dipoena umbratilis (Simon, 1873) | It | Info | ||
| Haplodrassus umbratilis (L. Koch, 1866) | It | Info | ||
| Drepanotylus uncatus (O. Pickard-Cambridge, 1873) | It | Info | ||
| Salticus unciger (Simon, 1868) | It / Sic | Info | ||
| Neottiura uncinata (Lucas, 1846) | It / Sard / Sic | Info | ||
| Dictyna uncinata Thorell, 1856 | It | Info | ||
| Pistius undulatus Karsch, 1879 | It | Info | ||
| Robertus ungulatus Vogelsanger, 1944 | It | Info | ||
| Holoscotolemon unicolor Roewer, 1915 | It | Info | ||
| Walckenaeria unicornis O. Pickard-Cambridge, 1861 | It | Info | ||
| Scytodes univittata Simon, 1882 | It / Sard / Sic | Introduced | Info | |
| Pseudomogrus univittatus (Simon, 1871) | Sard | Info | ||
| Aelurillus v-insignitus (Clerck, 1757) | It / Sard / Sic | Info | ||
| Ephippiochthonius vachoni (Heurtault-Rossi, 1963) | Info | |||
| Pseudeuophrys vafra (Blackwall, 1867) | It / Sard / Sic | Info | ||
| Prinerigone vagans (Audouin, 1826) | It / Sard / Sic | Info | ||
| Tiso vagans (Blackwall, 1834) | It / Sard | Info | ||
| Oreonetides vaginatus (Thorell, 1872) | It | Info | ||
| Philodromus vagulus Simon, 1875 | It | Info | ||
| Mitostoma valdemonense Marcellino, 1974 | It / Sic | Italian Endemic | Info | |
| Zodarion valentii Bosmans, Loverre & Addante, 2019 | It / Sic | Italian Endemic | Info | |
| Ischnocolus valentinus (Dufour, 1820) | Sic | Info | ||
| Neon valentulus Falconer, 1912 | It | Info | ||
| Drassodex validior (Simon, 1914) | It | Info | ||
| Scotophaeus validus (Lucas, 1846) | It / Sard / Sic | Info | ||
| Paratrachelas validus (Simon, 1884) | It | Info | ||
| Coelotes vallei Brignoli, 1977 | It | Italian Endemic | Info | |
| Siro valleorum Chemini, 1992 | It | Italian Endemic | Info | |
| Araeoncus vaporariorum (O. Pickard-Cambridge, 1875) | It | Endemic | Info | |
| Mughiphantes variabilis (Kulczynski, 1887) | It | Endemic | Info | |
| Arctosa variana C.L. Koch, 1847 | It / Sard / Sic | Info | ||
| Poecilochroa variana (C.L. Koch, 1839) | It / Sic | Info | ||
| Theridion varians rusticum Simon, 1873 | It / Sic | Info | ||
| Theridion varians varians Hahn, 1833 | It / Sard / Sic | Info | ||
| Poeciloneta variegata (Blackwall, 1841) | It | Info | ||
| Ballus variegatus Simon, 1876 | It | Info | ||
| Trichoncus varipes Denis, 1965 | It | Info | ||
| Misumena vatia (Clerck, 1757) | It / Sard / Sic | Info | ||
| Porrhoclubiona vegeta (Simon, 1918) | It / Sard / Sic | Info | ||
| Biton velox Simon, 1885 | Sic | Info | ||
| Scytodes velutina Heineken & Lowe, 1832 | It / Sard / Sic | Info | ||
| Synageles venator (Lucas, 1836) | It / Sard / Sic | Info | ||
| Scotinotylus venetus (Thorell, 1875) | It | Info | ||
| Dysdera ventricosa Grasshoff, 1959 | Sard / Sic | Italian Endemic | Info | |
| Enoplognatha verae Bosmans & Van Keer, 1999 | Sard | Info | ||
| Parachtes vernae (Caporiacco, 1936) | It | Italian Endemic | Info | |
| Metopobactrus verticalis (Simon, 1881) | It | Endemic | Info | |
| Zelotes vespertinus (Thorell, 1875) | It | Info | ||
| Maimuna vestita (C.L. Koch, 1841) | It | Info | ||
| Titanoeca veteranica Herman, 1879 | It | Info | ||
| Microneta viaria (Blackwall, 1841) | It / Sard | Info | ||
| Brigittea vicina (Simon, 1873) | It | Info | ||
| Zodarion vicinum Denis, 1935 | It / Sard | Italian Endemic | Info | |
| Allomengea vidua (L. Koch, 1879) | It | Info | ||
| Walckenaeria vigilax (Blackwall, 1853) | It | Info | ||
| Troglohyphantes vignai Brignoli, 1971 | It | Italian Endemic | Info | |
| Cybaeus vignai Brignoli, 1977 | It | Endemic | Info | |
| Megabunus vignai Martens, 1978 | It | Info | ||
| Arctosa villica (Lucas, 1846) | It | Info | ||
| Drassyllus villicus (Thorell, 1875) | It | Info | ||
| Drassodes villosus (Thorell, 1856) | It | Info | ||
| Tallusia vindobonensis (Kulczynski, 1898) | It | Info | ||
| Parasyrisca vinosa (Simon, 1878) | It | Info | ||
| Cheiracanthium virescens (Sundevall, 1833) | It | Info | ||
| Micrommata virescens (Clerck, 1757) | It / Sard | Info | ||
| Ptychosoma vitellinum (Soerensen, 1873) | It / Sard / Sic | Info | ||
| Pardosa vittata (Keyserling, 1863) | It | Info | ||
| Anelosimus vittatus (C.L. Koch, 1836) | It / Sard / Sic | Info | ||
| Gongylidiellum vivum (O. Pickard-Cambridge, 1875) | It / Sic | Info | ||
| Eratigena vomeroi (Brignoli, 1977) | It | Italian Endemic | Info | |
| Thanatus vulgaris Simon, 1870 | It / Sard / Sic | Info | ||
| Pardosa wagleri (Hahn, 1822) | It | Info | ||
| Amblyocarenum walckenaeri (Lucas, 1846) | It / Sic | Info | ||
| Eresus walckenaeri Brullé, 1832 | It / Sic | Info | ||
| Nigma walckenaeri (Roewer, 1951) | It / Sard / Sic | Info | ||
| Eusparassus walckenaeri (Audouin, 1826) | It / Sic | Info | ||
| Uloborus walckenaerius Latreille, 1806 | It / Sard / Sic | Info | ||
| Dysdera westringi O. Pickard-Cambridge, 1872 | It / Sic | Info | ||
| Ceratinella wideri (Thorell, 1871) | It | Info | ||
| Allochernes wideri phaleratus (Simon, 1879) | It / Sard | Info | ||
| Allochernes wideri wideri (C.L. Koch, 1843) | It | Info | ||
| Zygiella x-notata (Clerck, 1757) | It / Sard / Sic | Info | ||
| Carrhotus xanthogramma (Latreille, 1819) | It / Sard | Info | ||
| Phlegra yaelae Prószyński, 1998 | Sic | Info | ||
| Tetragnatha zangherii (Caporiacco, 1926) | It | Endemic | Info | |
| Harpactea zannonensis Alicata, 1966 | It | Italian Endemic | Info | |
| Troglohyphantes zanoni Pesarini, 1988 | It | Italian Endemic | Info | |
| Salticus zebraneus (C.L. Koch, 1837) | It / Sard / Sic | Info | ||
| Zelotes zellensis Grimm, 1982 | It | Info | ||
| Tenuiphantes zimmermanni (Bertkau, 1890) | It / Sard | Info | ||
| Attulus zimmermanni (Simon, 1877) | It / Sic | Info | ||
| Ephippiochthonius zoiai (Gardini, 1990) | It | Italian Endemic | Info | |
| Neobisium (Ommatoblothrus) zoiai Gardini & Rizzerio, 1986 | It | Italian Endemic | Info | |
| Roncus zoiai Gardini & Rizzerio, 1987 | Sard | Italian Endemic | Info | |
| Acanthocreagris zoiai Gardini, 1998 | It | Italian Endemic | Info | |
| Canariphantes zonatus (Simon, 1884) | It / Sard / Sic | Info |