| Acaridae Latreille, 1802 | Acarid mites | 2 | Species | Taxom |
| Amblyommidae Banks, 1907 | | 14 | Species | Taxom |
| Ameroseiidae Evans, 1961 | | 1 | Species | Taxom |
| Analgidae Trouessart &..., 1884 | Feather mites | 0 | Species | Taxom |
| Anapidae Simon, 1895 | Anapid spiders | 1 | Species | Taxom |
| Araneidae Simon, 1895 | Golden orb web spiders | 118 | Species | Taxom |
| Arceremaeidae Balogh, 1972 | | 1 | Species | Taxom |
| Ascidae Oudemans, 1905 | | 0 | Species | Taxom |
| Assamiidae Sørensen, 1884 | | 0 | Species | Taxom |
| Atemnidae Chamberlin, 1931 | | 14 | Species | Taxom |
| Atopomelidae Fain, 1972 | | 6 | Species | Taxom |
| Barychelidae Simon, 1889 | Brush-footed trapdoors | 1 | Species | Taxom |
| Basilobelbidae Balogh, 1961 | | 4 | Species | Taxom |
| Biantidae Thorell, 1889 | | 0 | Species | Taxom |
| Buthidae C. L. Koch, 1837 | Arrowbreasted scorpions | 7 | Species | Taxom |
| Caloppiidae (Balogh, 1960) | | 1 | Species | Taxom |
| Canestriniidae Berlese, 1884 | | 1 | Species | Taxom |
| Carabodidae Koch, 1837 | | 2 | Species | Taxom |
| Ceratozetidae Jacot, 1925 | | 1 | Species | Taxom |
| Chaerilidae Pocock, 1893 | | 4 | Species | Taxom |
| Charontidae Simon, 1892 | | 3 | Species | Taxom |
| Cheiridiidae Hansen, 1893 | | 2 | Species | Taxom |
| Cheliferidae Risso, 1826 | | 6 | Species | Taxom |
| Chernetidae Menge, 1855 | | 6 | Species | Taxom |
| Cheyletidae Leach, 1815 | | 49 | Species | Taxom |
| Chirodiscidae Trouessart, 1892 | | 12 | Species | Taxom |
| Chthoniidae Daday, 1888 | | 6 | Species | Taxom |
| Clubionidae Wagner, 1887 | Clubiones | 30 | Species | Taxom |
| Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 12 | Species | Taxom |
| Ctenidae Keyserling, 1877 | Tropical wolf spiders | 6 | Species | Taxom |
| Cunaxidae Thor, 1902 | Predatory Mites | 41 | Species | Taxom |
| Cuneoppiidae Balogh, 1983 | | 1 | Species | Taxom |
| Cymbaeremaeidae Sellnick, 1928 | | 1 | Species | Taxom |
| Dampfiellidae Balogh, 1961 | | 6 | Species | Taxom |
| Deinopidae C. L. Koch, 1850 | Net-casters | 7 | Species | Taxom |
| Deraiophoridae Trägårdh, 1952 | | 8 | Species | Taxom |
| Dermanyssidae Kolenati, 1859 | Dermanyssid mites | 0 | Species | Taxom |
| Dermationidae Fain, 1965 | | 2 | Species | Taxom |
| Diarthrophallidae Trägårdh, 1946 | | 1 | Species | Taxom |
| Dictynidae O. P-Cambridge, 1871 | Dictynid spiders | 2 | Species | Taxom |
| Dysderidae C. L. Koch, 1837 | Dysderid spiders | 1 | Species | Taxom |
| Echimyopodidae Fain, 1967 | | 1 | Species | Taxom |
| Entonyssidae Ewing, 1922 | | 1 | Species | Taxom |
| Epedanidae Sørensen, 1886 | | 9 | Species | Taxom |
| Epidermoptidae Trouessart, 1892 | | 0 | Species | Taxom |
| Epilohmanniidae Oudemans, 1923 | | 1 | Species | Taxom |
| Eremulidae Grandjean, 1965 | | 1 | Species | Taxom |
| Eukoeneniidae Condé, 1965 | | 1 | Species | Taxom |
| Eupalopsellidae Willmann, 1952 | | 5 | Species | Taxom |
| Eustathiidae Oudemans, 1905 | | 2 | Species | Taxom |
| Eviphididae Berlese, 1913 | | 1 | Species | Taxom |
| Fedrizziidae Trägårdh, 1937 | | 2 | Species | Taxom |
| Filistatidae Ausserer, 1867 | Crevice weaver | 3 | Species | Taxom |
| Gabuciniidae Gaud & Atyeo, 1975 | | 1 | Species | Taxom |
| Galumnidae Jacot, 1925 | | 4 | Species | Taxom |
| Garypidae Simon, 1879 | | 1 | Species | Taxom |
| Gastronyssidae Fain, 1956 | | 2 | Species | Taxom |
| Geogarypidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Glycyphagidae De Geer, 1778 | | 0 | Species | Taxom |
| Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 13 | Species | Taxom |
| Hahniidae Bertkau, 1878 | Dwarf sheet spiders | 3 | Species | Taxom |
| Halacaridae Murray, 1877 | Sea mites | 22 | Species | Taxom |
| Halonoproctidae Pocock, 1901 | | 0 | Species | Taxom |
| Haplochthoniidae Van der Hammen, 1959 | | 1 | Species | Taxom |
| Haplozetidae Grandjean, 1936 | | 13 | Species | Taxom |
| Hermanniidae Sellnick, 1928 | | 1 | Species | Taxom |
| Hersiliidae Thorell, 1870 | Hersiliids | 5 | Species | Taxom |
| Heterocoptidae Fain, 1967 | | 1 | Species | Taxom |
| Heterozerconidae Berlese, 1892 | | 1 | Species | Taxom |
| Histiostomatidae Berlese, 1897 | | 1 | Species | Taxom |
| Hormuridae Laurie, 1896 | | 4 | Species | Taxom |
| Hubbardiidae Cook, 1899 | Hubbardiid shorttailed whipscorpions | 2 | Species | Taxom |
| Hyadesiidae Halbert, 1915 | | 4 | Species | Taxom |
| Hydryphantidae Piersig, 1896 | | 3 | Species | Taxom |
| Hyidae Chamberlin, 1930 | | 2 | Species | Taxom |
| Hypoderatidae (Murray, 1877) | | 0 | Species | Taxom |
| Iolinidae Pritchard, 1956 | | 0 | Species | Taxom |
| Ixodidae C. L. Koch, 1844 | Hard Tick | 3 | Species | Taxom |
| Labidostommatidae Oudemans, 1904 | | 1 | Species | Taxom |
| Laelapidae Berlese, 1892 | | 33 | Species | Taxom |
| Leeuwenhoekiidae Womersley, 1944 | Chigger mites | 3 | Species | Taxom |
| Linyphiidae Blackwall, 1859 | Dwarf spiders | 14 | Species | Taxom |
| Liocranidae Simon, 1897 | Liocranid sac spiders | 3 | Species | Taxom |
| Listrophoridae Mégnin & Tro..., 1884 | | 1 | Species | Taxom |
| Lohmanniidae Berlese, 1916 | | 6 | Species | Taxom |
| Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 25 | Species | Taxom |
| Macrochelidae Vitzthum, 1930 | | 1 | Species | Taxom |
| Macrodinychidae Hirschmann, 1979 | | 0 | Species | Taxom |
| Macronyssidae Oudemans, 1936 | Macronyssid Mites | 1 | Species | Taxom |
| Mecognathidae Gerson & Walter, 1998 | | 1 | Species | Taxom |
| Mesoplophoridae Ewing, 1917 | | 1 | Species | Taxom |
| Microtegeidae Balogh, 1972 | | 1 | Species | Taxom |
| Mimetidae Simon, 1881 | Pirate spider | 5 | Species | Taxom |
| Miturgidae Simon, 1885 | Long-legged sac spiders | 14 | Species | Taxom |
| Myobiidae Megnin, 1877 | | 9 | Species | Taxom |
| Mysmenidae Petrunkevitch, 1928 | Dwarf cobweb spiders | 2 | Species | Taxom |
| Nanhermanniidae Sellnick, 1928 | | 1 | Species | Taxom |
| Nenteriidae Hirschmann, 1979 | | 1 | Species | Taxom |
| Neobisiidae Chamberlin, 1930 | | 4 | Species | Taxom |
| Nesticidae Simon, 1894 | Cave cobweb spider | 1 | Species | Taxom |
| Nosybelbidae Mahunka, 1994 | | 6 | Species | Taxom |
| Ochyroceratidae Fage, 1912 | Midget ground weaver | 16 | Species | Taxom |
| Oconnoriidae J. Gaud, W. ..., 1989 | | 1 | Species | Taxom |
| Ologamasidae Ryke, 1962 | | 2 | Species | Taxom |
| Olpiidae Banks, 1895 | | 1 | Species | Taxom |
| Oonopidae Simon, 1890 | Dwarf Cell Spiders | 14 | Species | Taxom |
| Oplitidae Johnston, 1968 | | 1 | Species | Taxom |
| Oppiidae Sellnick, 1937 | | 3 | Species | Taxom |
| Oribotritiidae Grandjean, 1954 | | 4 | Species | Taxom |
| Oripodidae Jacot, 1925 | | 4 | Species | Taxom |
| Otocepheidae Balogh, 1961 | | 21 | Species | Taxom |
| Oxyopidae Thorell, 1870 | Lynx spiders | 12 | Species | Taxom |
| Pachylaelapidae Berlese, 1913 | | 1 | Species | Taxom |
| Paramegistidae Trägårdh, 1946 | | 1 | Species | Taxom |
| Parasitidae Oudemans, 1901 | Beetle Mites | 1 | Species | Taxom |
| Parholaspididae Evans, 1956 | | 9 | Species | Taxom |
| Petrobunidae Sharma & Gir..., 2011 | | 3 | Species | Taxom |
| Phalangiidae Latreille, 1802 | Daddy-Long-Legs | 1 | Species | Taxom |
| Philodromidae Thorell, 1870 | False crab spiders | 2 | Species | Taxom |
| Pholcidae C. L. Koch, 1851 | Carpenter spider | 54 | Species | Taxom |
| Phrynidae Blanchard, 1852 | | 1 | Species | Taxom |
| Phthiracaridae Perty, 1841 | | 3 | Species | Taxom |
| Phytoseiidae Berlese, 1916 | Phytoseiid mites | 2 | Species | Taxom |
| Pisauridae Simon, 1890 | Big wolf spider | 13 | Species | Taxom |
| Podapolipidae Husband, 1990 | | 5 | Species | Taxom |
| Podocinidae Berlese, 1913 | | 1 | Species | Taxom |
| Podoctidae Roewer, 1912 | | 13 | Species | Taxom |
| Pontarachnidae Koenike, 1910 | | 1 | Species | Taxom |
| Protoribatidae J. & P. Balogh, 1984 | | 2 | Species | Taxom |
| Psechridae James, 1989 | Psechrid spiders | 6 | Species | Taxom |
| Pseudochiridiidae Chamberlin, 1923 | | 1 | Species | Taxom |
| Psilodercidae Machado, 1951 | | 5 | Species | Taxom |
| Pterolichidae Trouessart, 1899 | | 1 | Species | Taxom |
| Pteronyssidae Oudemans, 1941 | | 3 | Species | Taxom |
| Pterygosomatidae Womersley, 1941 | | 3 | Species | Taxom |
| Salticidae Blackwall, 1842 | Jumping Spider | 174 | Species | Taxom |
| Sandokanidae Özdikmen & K..., 2007 | | 11 | Species | Taxom |
| Sarcoptidae Megnin, 1877 | Itch mites | 29 | Species | Taxom |
| Scheloribatidae Jacot, 1935 | | 24 | Species | Taxom |
| Schizogyniidae Trägårdh, 1950 | | 1 | Species | Taxom |
| Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 34 | Species | Taxom |
| Scorpionidae Pierre André..., 1802 | Largeclaw scorpions | 4 | Species | Taxom |
| Scutoverticidae Grandjean, 1954 | | 2 | Species | Taxom |
| Scytodidae Blackwall, 1864 | Glue spitter | 4 | Species | Taxom |
| Segestriidae Simon, 1893 | Six-eyed Spiders | 3 | Species | Taxom |
| Sejidae Berlese, 1885 | | 0 | Species | Taxom |
| Selenopidae Simon, 1897 | Flatties | 1 | Species | Taxom |
| Sicariidae Keyserling, 1880 | Brown recluse spiders | 1 | Species | Taxom |
| Sparassidae Bertkau, 1872 | Giant crab spiders | 28 | Species | Taxom |
| Sphaerochthoniidae Grandjean, 1947 | | 1 | Species | Taxom |
| Spinturnicidae Oudemans, 1902 | | 6 | Species | Taxom |
| Steganacaridae (Niedbała, 1986) | | 1 | Species | Taxom |
| Stenochilidae Thorell, 1873 | Stenochilid spiders | 3 | Species | Taxom |
| Stigmaeidae Wood, 1967 | | 11 | Species | Taxom |
| Stylocellidae Hansen & Sör..., 1904 | | 1 | Species | Taxom |
| Suctobelbidae Jacot, 1938 | | 2 | Species | Taxom |
| Suidasiidae Hughes, 1948 | | 1 | Species | Taxom |
| Syarinidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Syringophilidae Lavoipierre, 1953 | Quill mites | 4 | Species | Taxom |
| Tarsonemidae Kramer, 1877 | Tarsonemid mites | 2 | Species | Taxom |
| Tegoribatidae Grandjean, 1954 | | 1 | Species | Taxom |
| Tenuipalpidae Berlese, 1913 | False spider mites | 5 | Species | Taxom |
| Tetrablemmidae O. P-Cambridge, 1873 | Armored spider | 5 | Species | Taxom |
| Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 63 | Species | Taxom |
| Tetranychidae Donnadieu, 1875 | Spider mites | 42 | Species | Taxom |
| Thelyphonidae Lucas, 1835 | | 15 | Species | Taxom |
| Theraphosidae Thorell, 1870 | Bird-eating spiders | 21 | Species | Taxom |
| Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 66 | Species | Taxom |
| Theridiosomatidae Simon, 1881 | Ray orbweavers | 2 | Species | Taxom |
| Thomisidae Sundevall, 1833 | Crab Spider | 50 | Species | Taxom |
| Thysanocercidae Atyeo & Pete..., 1972 | | 0 | Species | Taxom |
| Titanoecidae Lehtinen, 1967 | Rock Weavers | 1 | Species | Taxom |
| Trachyuropodidae Kramer, 1881 | | 5 | Species | Taxom |
| Trematuridae Berlese, 1917 | | 13 | Species | Taxom |
| Triaenonychidae Sörensen, 1886 | | 1 | Species | Taxom |
| Trigonuropodidae Hirschmann, 1979 | | 11 | Species | Taxom |
| Trombiculidae Ewing, 1929 | Chigger mites | 40 | Species | Taxom |
| Tuckerellidae Baker & Prit..., 1953 | Peacock mites | 1 | Species | Taxom |
| Uloboridae Thorell, 1869 | Cribellate orb weavers | 9 | Species | Taxom |
| Urodinychidae Berlese, 1917 | | 3 | Species | Taxom |
| Uropodidae Kramer, 1881 | | 12 | Species | Taxom |
| Varroidae Delfinado & ..., 1974 | | 1 | Species | Taxom |
| Vexillariidae Gaud & Mouchet, 1959 | | 0 | Species | Taxom |
| Walchiidae Ewing, 1946 | | 1 | Species | Taxom |
| Withiidae Chamberlin, 1931 | | 2 | Species | Taxom |
| Xolalgidae Dubinin, 1953 | | 1 | Species | Taxom |
| Zalmoxidae (Sörensen, 1886) | | 10 | Species | Taxom |
| Zodariidae Thorell, 1881 | Ant spiders | 13 | Species | Taxom |
