| Acaridae Latreille, 1802 | Acarid mites | 2 | Species | Taxom |
| Acaronychidae Grandjean, 1932 | | 1 | Species | Taxom |
| Achipteriidae Thor, 1929 | | 13 | Species | Taxom |
| Adelphacaridae Grandjean, 1954 | | 1 | Species | Taxom |
| Agelenidae C. L. Koch, 1837 | Agelenid Spiders | 14 | Species | Taxom |
| Aleurodamaeidae Paschoal & J..., 1985 | | 1 | Species | Taxom |
| Amaurobiidae Thorell, 1870 | Amaurobiids | 4 | Species | Taxom |
| Amblyommidae Banks, 1907 | | 1 | Species | Taxom |
| Ameronothridae Willmann, 1931 | | 7 | Species | Taxom |
| Anapidae Simon, 1895 | Anapid spiders | 19 | Species | Taxom |
| Anyphaenidae Bertkau, 1878 | Anyphaenid sac spiders | 2 | Species | Taxom |
| Araneidae Simon, 1895 | Golden orb web spiders | 55 | Species | Taxom |
| Archaeidae C. L. Koch &..., 1854 | Archaeid spiders | 11 | Species | Taxom |
| Archaeorchestidae Arillo & Sub..., 2000 | | 3 | Species | Taxom |
| Arrenuridae Thor, 1900 | | 3 | Species | Taxom |
| Astegistidae Balogh, 1961 | | 5 | Species | Taxom |
| Atemnidae Chamberlin, 1931 | | 1 | Species | Taxom |
| Atypidae Thorell, 1870 | Atypical tarantulas | 2 | Species | Taxom |
| Autognetidae Grandjean, 1960 | | 4 | Species | Taxom |
| Baltsuccinidae Wunderlich, 2004 | | 2 | Species | Taxom |
| Bdellidae Dugès, 1834 | Snout Mites | 1 | Species | Taxom |
| Belbidae (Willmann, 1931) | | 5 | Species | Taxom |
| Blattisociidae (Garman, 1948) | | 0 | Species | Taxom |
| Brachychthoniidae Thor, 1934 | | 27 | Species | Taxom |
| Buthidae C. L. Koch, 1837 | Arrowbreasted scorpions | 9 | Species | Taxom |
| Caleremaeidae Grandjean, 1965 | | 1 | Species | Taxom |
| Camisiidae Oudemans, 1900 | | 2 | Species | Taxom |
| Carabodidae Koch, 1837 | | 16 | Species | Taxom |
| Cepheidae (Berlese, 1896) | | 1 | Species | Taxom |
| Cepheusidae Berlese, 1896 | | 2 | Species | Taxom |
| Ceratoppiidae (Kunst, 1971) | | 4 | Species | Taxom |
| Ceratozetidae Jacot, 1925 | | 42 | Species | Taxom |
| Chamobatidae Thor, 1937 | | 11 | Species | Taxom |
| Cheiridiidae Hansen, 1893 | | 2 | Species | Taxom |
| Cheliferidae Risso, 1826 | | 7 | Species | Taxom |
| Chernetidae Menge, 1855 | | 2 | Species | Taxom |
| Cheyletidae Leach, 1815 | | 10 | Species | Taxom |
| Chthoniidae Daday, 1888 | | 3 | Species | Taxom |
| Clubionidae Wagner, 1887 | Clubiones | 24 | Species | Taxom |
| Collohmanniidae Grandjean, 1958 | | 2 | Species | Taxom |
| Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 13 | Species | Taxom |
| Cosmochthoniidae Grandjean, 1946 | | 5 | Species | Taxom |
| Crotoniidae Thorell, 1876 | | 14 | Species | Taxom |
| Ctenacaridae Grandjean, 1954 | | 2 | Species | Taxom |
| Ctenizidae Thorell, 1887 | Cork-lid trapdoor spider | 3 | Species | Taxom |
| Ctenobelbidae Grandjean, 1965 | | 3 | Species | Taxom |
| Cunaxidae Thor, 1902 | Predatory Mites | 1 | Species | Taxom |
| Cyatholipidae Simon, 1894 | Cyatholipid spiders | 9 | Species | Taxom |
| Cybaeidae Banks, 1892 | Pond Water Spiders | 1 | Species | Taxom |
| Cymbaeremaeidae Sellnick, 1928 | | 4 | Species | Taxom |
| Daesiidae Kraepelin, 1899 | | 3 | Species | Taxom |
| Damaeidae Berlese, 1896 | | 40 | Species | Taxom |
| Damaeolidae Grandjean, 1965 | | 3 | Species | Taxom |
| Deinopidae C. L. Koch, 1850 | Net-casters | 1 | Species | Taxom |
| Desidae Pocock, 1895 | Desid spiders | 3 | Species | Taxom |
| Dictynidae O. P-Cambridge, 1871 | Dictynid spiders | 37 | Species | Taxom |
| Digamasellidae Evans, 1957 | | 1 | Species | Taxom |
| Dipluridae Simon, 1889 | Curtainweb Spiders | 1 | Species | Taxom |
| Dolichocybidae Mahunka, 1970 | | 0 | Species | Taxom |
| Dysderidae C. L. Koch, 1837 | Dysderid spiders | 12 | Species | Taxom |
| Eniochthoniidae Grandjean, 1947 | | 1 | Species | Taxom |
| Ephalmatoridae Petrunkevitch, 1958 | | 11 | Species | Taxom |
| Epilohmanniidae Oudemans, 1923 | | 4 | Species | Taxom |
| Epimerellidae Ayyildiz & L..., 1989 | | 1 | Species | Taxom |
| Eremaeidae Oudemans, 1900 | | 6 | Species | Taxom |
| Eremobelbidae Balogh, 1961 | | 1 | Species | Taxom |
| Eremulidae Grandjean, 1965 | | 2 | Species | Taxom |
| Eresidae C. L. Koch, 1851 | Eresid spiders | 1 | Species | Taxom |
| Eriophyidae Nalepa, 1898 | Blister mites | 12 | Species | Taxom |
| Erythraeidae Oudemans, 1902 | | 1 | Species | Taxom |
| Eulohmanniidae Grandjean, 1931 | | 1 | Species | Taxom |
| Euphthiracaridae Jacot, 1930 | | 5 | Species | Taxom |
| Euscorpiidae Laurie, 1896 | Shorttail scorpions | 1 | Species | Taxom |
| Eylaidae Leach, 1815 | | 1 | Species | Taxom |
| Galeodidae Sundevall, 1833 | | 1 | Species | Taxom |
| Galumnidae Jacot, 1925 | | 21 | Species | Taxom |
| Garypinidae Daday, 1888 | | 1 | Species | Taxom |
| Geogarypidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Glaesacaridae | | 1 | Species | Taxom |
| Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 43 | Species | Taxom |
| Gonyleptidae Sundevall, 1833 | | 1 | Species | Taxom |
| Gustaviidae Oudemans, 1900 | | 3 | Species | Taxom |
| Gymnodamaeidae Grandjean, 1954 | | 6 | Species | Taxom |
| Hahniidae Bertkau, 1878 | Dwarf sheet spiders | 11 | Species | Taxom |
| Haplochthoniidae Van der Hammen, 1959 | | 1 | Species | Taxom |
| Haplozetidae Grandjean, 1936 | | 6 | Species | Taxom |
| Harpirhynchidae Dubinin, 1957 | | 2 | Species | Taxom |
| Hemileiidae (J. & P. Balogh, 1984) | | 4 | Species | Taxom |
| Hermanniellidae Grandjean, 1934 | | 8 | Species | Taxom |
| Hermanniidae Sellnick, 1928 | | 5 | Species | Taxom |
| Hersiliidae Thorell, 1870 | Hersiliids | 4 | Species | Taxom |
| Humerobatidae Grandjean, 1970 | | 9 | Species | Taxom |
| Hungarobelbidae (Miko & Travé, 1996) | | 1 | Species | Taxom |
| Hydrodromidae Viets, 1936 | | 1 | Species | Taxom |
| Hydrozetidae Grandjean, 1954 | | 5 | Species | Taxom |
| Hygrobatidae Koch, 1842 | | 4 | Species | Taxom |
| Hypochthoniidae Berlese, 1910 | | 2 | Species | Taxom |
| Insecutoridae Petrunkevitch, 1942 | | 5 | Species | Taxom |
| Ixodidae C. L. Koch, 1844 | Hard Tick | 2 | Species | Taxom |
| Johnstonianidae Thor, 1935 | | 1 | Species | Taxom |
| Labidostommatidae Oudemans, 1904 | | 2 | Species | Taxom |
| Laelapidae Berlese, 1892 | | 0 | Species | Taxom |
| Lebertiidae Thor, 1900 | | 2 | Species | Taxom |
| Leptonetidae Simon, 1890 | Cave spiders | 7 | Species | Taxom |
| Liacaridae Sellnick, 1928 | | 20 | Species | Taxom |
| Licneremaeidae Grandjean, 1931 | | 2 | Species | Taxom |
| Licnobelbidae (Grandjean, 1965) | | 1 | Species | Taxom |
| Licnodamaeidae (Grandjean, 1954) | | 3 | Species | Taxom |
| Liebstadiidae J. & P. Balogh, 1984 | | 4 | Species | Taxom |
| Limnesiidae Thor, 1900 | | 1 | Species | Taxom |
| Limnozetidae Thor, 1937 | | 2 | Species | Taxom |
| Linyphiidae Blackwall, 1859 | Dwarf spiders | 152 | Species | Taxom |
| Liocranidae Simon, 1897 | Liocranid sac spiders | 10 | Species | Taxom |
| Lohmanniidae Berlese, 1916 | | 3 | Species | Taxom |
| Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 42 | Species | Taxom |
| Machuellidae Balogh, 1983 | | 0 | Species | Taxom |
| Malaconothridae Berlese, 1916 | | 10 | Species | Taxom |
| Micreremidae Grandjean, 1954 | | 2 | Species | Taxom |
| Microzetidae Grandjean, 1936 | | 4 | Species | Taxom |
| Mideopsidae Koenike, 1910 | | 1 | Species | Taxom |
| Mimetidae Simon, 1881 | Pirate spider | 15 | Species | Taxom |
| Miturgidae Simon, 1885 | Long-legged sac spiders | 3 | Species | Taxom |
| Mochlozetidae Grandjean, 1960 | | 2 | Species | Taxom |
| Mycobatidae Grandjean, 1954 | | 2 | Species | Taxom |
| Myobiidae Megnin, 1877 | | 1 | Species | Taxom |
| Mysmenidae Petrunkevitch, 1928 | Dwarf cobweb spiders | 12 | Species | Taxom |
| Nanhermanniidae Sellnick, 1928 | | 6 | Species | Taxom |
| Nanorchestidae Luxton, 1984 | | 0 | Species | Taxom |
| Nemastomatidae Simon, 1872 | | 8 | Species | Taxom |
| Neobisiidae Chamberlin, 1930 | | 7 | Species | Taxom |
| Neoliodidae (Sellnick, 1928) | | 6 | Species | Taxom |
| Neopygmephoridae Cross, 1965 | | 3 | Species | Taxom |
| Nesticidae Simon, 1894 | Cave cobweb spider | 25 | Species | Taxom |
| Nothridae Berlese, 1896 | | 10 | Species | Taxom |
| Oecobiidae Blackwall, 1862 | Disc web spider | 6 | Species | Taxom |
| Ologamasidae Ryke, 1962 | | 1 | Species | Taxom |
| Oonopidae Simon, 1890 | Dwarf Cell Spiders | 17 | Species | Taxom |
| Opilioacaridae With, 1902 | | 2 | Species | Taxom |
| Oppiidae Sellnick, 1937 | | 50 | Species | Taxom |
| Oribatellidae Jacot, 1925 | | 16 | Species | Taxom |
| Oribatulidae Thor, 1929 | | 28 | Species | Taxom |
| Oribellidae (Kunst, 1971) | | 4 | Species | Taxom |
| Oribotritiidae Grandjean, 1954 | | 7 | Species | Taxom |
| Oxidae Viets, 1926 | | 1 | Species | Taxom |
| Oxyopidae Thorell, 1870 | Lynx spiders | 4 | Species | Taxom |
| Palaeacaridae Grandjean, 1932 | | 2 | Species | Taxom |
| Parakalummidae Grandjean, 1936 | | 2 | Species | Taxom |
| Parhypochthoniidae Grandjean, 1932 | | 1 | Species | Taxom |
| Passalozetidae Grandjean, 1954 | | 4 | Species | Taxom |
| Penthaleidae Oudemans, 1931 | Earth Mites | 1 | Species | Taxom |
| Perlohmanniidae Grandjean, 1954 | | 1 | Species | Taxom |
| Phalangiidae Latreille, 1802 | Daddy-Long-Legs | 13 | Species | Taxom |
| Phenopelopidae Petrunkevitch, 1955 | | 14 | Species | Taxom |
| Philodromidae Thorell, 1870 | False crab spiders | 19 | Species | Taxom |
| Pholcidae C. L. Koch, 1851 | Carpenter spider | 7 | Species | Taxom |
| Phrurolithidae Banks, 1892 | Phrurolithid Spiders | 18 | Species | Taxom |
| Phthiracaridae Perty, 1841 | | 38 | Species | Taxom |
| Phytoptidae Manson, 1970 | | 1 | Species | Taxom |
| Pimoidae Wunderlich, 1986 | Pimoid spiders | 8 | Species | Taxom |
| Pionidae Thor, 1900 | | 5 | Species | Taxom |
| Pisauridae Simon, 1890 | Big wolf spider | 4 | Species | Taxom |
| Plateremaeidae Trägårdh, 1931 | | 2 | Species | Taxom |
| Plectreuridae Simon, 1893 | Plectreurid spider | 1 | Species | Taxom |
| Praetheridiidae Wunderlich, 2004 | | 1 | Species | Taxom |
| Protheridiidae Wunderlich, 2004 | | 4 | Species | Taxom |
| Protoribatidae J. & P. Balogh, 1984 | | 3 | Species | Taxom |
| Pseudogarypidae J.C. Chamberlin, 1923 | | 3 | Species | Taxom |
| Pumiliopimoidae Wunderlich, 2008 | | 1 | Species | Taxom |
| Punctoribatidae Thor, 1937 | | 17 | Species | Taxom |
| Pyemotidae Newport, 1850 | | 3 | Species | Taxom |
| Quadroppiidae Balogh, 1983 | | 5 | Species | Taxom |
| Rhagidiidae Zacharda, 1980 | | 1 | Species | Taxom |
| Sabaconidae Dresco, 1970 | Sabaconid Harvestmen | 1 | Species | Taxom |
| Salticidae Blackwall, 1842 | Jumping Spider | 87 | Species | Taxom |
| Scheloribatidae Jacot, 1935 | | 13 | Species | Taxom |
| Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 3 | Species | Taxom |
| Scutoverticidae Grandjean, 1954 | | 6 | Species | Taxom |
| Scytodidae Blackwall, 1864 | Glue spitter | 1 | Species | Taxom |
| Segestriidae Simon, 1893 | Six-eyed Spiders | 11 | Species | Taxom |
| Sejidae Berlese, 1885 | | 1 | Species | Taxom |
| Sironidae Simon, 1879 | | 1 | Species | Taxom |
| Smarididae Kramer, 1878 | | 3 | Species | Taxom |
| Solpugidae Leach, 1815 | | 1 | Species | Taxom |
| Sparassidae Bertkau, 1872 | Giant crab spiders | 8 | Species | Taxom |
| Spatiatoridae Petrunkevitch, 1942 | | 3 | Species | Taxom |
| Sphaerochthoniidae Grandjean, 1947 | | 1 | Species | Taxom |
| Succinomidae Wunderlich, 2008 | | 5 | Species | Taxom |
| Suctobelbidae Jacot, 1938 | | 38 | Species | Taxom |
| Synaphridae Wunderlich, 1986 | Midget Spiders | 1 | Species | Taxom |
| Synotaxidae Simon, 1894 | Synotaxid spiders | 12 | Species | Taxom |
| Syringophilidae Lavoipierre, 1953 | Quill mites | 4 | Species | Taxom |
| Tarsonemidae Kramer, 1877 | Tarsonemid mites | 1 | Species | Taxom |
| Tectocepheidae Grandjean, 1954 | | 9 | Species | Taxom |
| Tegoribatidae Grandjean, 1954 | | 3 | Species | Taxom |
| Telemidae Fage, 1913 | Long-legged cave spider | 1 | Species | Taxom |
| Tenuialidae Jacot, 1929 | | 1 | Species | Taxom |
| Tetrablemmidae O. P-Cambridge, 1873 | Armored spider | 1 | Species | Taxom |
| Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 28 | Species | Taxom |
| Tetranychidae Donnadieu, 1875 | Spider mites | 3 | Species | Taxom |
| Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 146 | Species | Taxom |
| Theridiosomatidae Simon, 1881 | Ray orbweavers | 6 | Species | Taxom |
| Thomisidae Sundevall, 1833 | Crab Spider | 40 | Species | Taxom |
| Thyrisomidae Grandjean, 1953 | | 3 | Species | Taxom |
| Titanoecidae Lehtinen, 1967 | Rock Weavers | 1 | Species | Taxom |
| Torrenticolidae Thor, 1902 | Torrent Mites | 2 | Species | Taxom |
| Travuniidae Absolon & Kr..., 1932 | | 0 | Species | Taxom |
| Trechaleidae Simon, 1890 | Trechaleid spiders | 2 | Species | Taxom |
| Trhypochthoniidae Willmann, 1931 | | 8 | Species | Taxom |
| Trochanteriidae Karsch, 1879 | Flat spiders | 25 | Species | Taxom |
| Trogulidae Sundevall, 1833 | | 1 | Species | Taxom |
| Trombidiidae Leach, 1815 | Beer Bahuti | 5 | Species | Taxom |
| Uloboridae Thorell, 1869 | Cribellate orb weavers | 15 | Species | Taxom |
| Unduloribatidae Kunst, 1971 | | 1 | Species | Taxom |
| Unionicolidae Oudemans, 1909 | | 2 | Species | Taxom |
| Urodinychidae Berlese, 1917 | | 0 | Species | Taxom |
| Uropodidae Kramer, 1881 | | 1 | Species | Taxom |
| Wettinidae Cook, 1956 | | 1 | Species | Taxom |
| Withiidae Chamberlin, 1931 | | 2 | Species | Taxom |
| Xenillidae Woolley & Hi..., 1966 | | 4 | Species | Taxom |
| Zetomotrichidae Grandjean, 1934 | | 1 | Species | Taxom |
| Zetorchestidae Michael, 1898 | | 6 | Species | Taxom |
| Zodariidae Thorell, 1881 | Ant spiders | 9 | Species | Taxom |
| Zoridae F. O. P-Camb..., 1893 | Wandering Spiders | 4 | Species | Taxom |
| Zoropsidae Bertkau, 1882 | False Huntsman Spiders | 16 | Species | Taxom |
