| Acaridae Latreille, 1802 | Acarid mites | 0 | Species | Taxom |
| Adelphacaridae Grandjean, 1954 | | 0 | Species | Taxom |
| Agelenidae C. L. Koch, 1837 | Agelenid Spiders | 19 | Species | Taxom |
| Alloptidae Gaud, 1957 | | 1 | Species | Taxom |
| Amaurobiidae Thorell, 1870 | Amaurobiids | 2 | Species | Taxom |
| Amblyommidae Banks, 1907 | | 16 | Species | Taxom |
| Ameroseiidae Evans, 1961 | | 1 | Species | Taxom |
| Ammotrechidae Roewer, 1934 | Curve-faced solifugid | 7 | Species | Taxom |
| Ammoxenidae Simon, 1893 | Ammoxenid spiders | 0 | Species | Taxom |
| Amphinectidae Forster & Wi..., 1973 | Amphinectid spiders | 1 | Species | Taxom |
| Analgidae Trouessart &..., 1884 | Feather mites | 1 | Species | Taxom |
| Anyphaenidae Bertkau, 1878 | Anyphaenid sac spiders | 7 | Species | Taxom |
| Araneidae Simon, 1895 | Golden orb web spiders | 61 | Species | Taxom |
| Argasidae C. L. Koch, 1844 | Soft tick | 12 | Species | Taxom |
| Ascidae Oudemans, 1905 | | 1 | Species | Taxom |
| Atemnidae Chamberlin, 1931 | | 1 | Species | Taxom |
| Atypidae Thorell, 1870 | Atypical tarantulas | 1 | Species | Taxom |
| Barychelidae Simon, 1889 | Brush-footed trapdoors | 1 | Species | Taxom |
| Bochicidae Chamberlin, 1930 | | 6 | Species | Taxom |
| Buthidae C. L. Koch, 1837 | Arrowbreasted scorpions | 16 | Species | Taxom |
| Camerobiidae Southcott, 1957 | Stilt-legged mites | 1 | Species | Taxom |
| Camisiidae Oudemans, 1900 | | 0 | Species | Taxom |
| Canestriniidae Berlese, 1884 | | 1 | Species | Taxom |
| Caponiidae Simon, 1890 | Caponiid spiders | 8 | Species | Taxom |
| Caraboacaridae Mahunka, 1970 | | 1 | Species | Taxom |
| Caraboctonidae Kraepelin, 1905 | | 1 | Species | Taxom |
| Carabodidae Koch, 1837 | | 1 | Species | Taxom |
| Ceratozetidae Jacot, 1925 | | 0 | Species | Taxom |
| Chactidae Reginald Inn..., 1893 | Fatclaw scorpions | 1 | Species | Taxom |
| Cheliferidae Risso, 1826 | | 7 | Species | Taxom |
| Chernetidae Menge, 1855 | | 14 | Species | Taxom |
| Cheyletidae Leach, 1815 | | 1 | Species | Taxom |
| Chthoniidae Daday, 1888 | | 11 | Species | Taxom |
| Clubionidae Wagner, 1887 | Clubiones | 4 | Species | Taxom |
| Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 15 | Species | Taxom |
| Cosmetidae C. L. Koch, 1839 | | 1 | Species | Taxom |
| Cosmochthoniidae Grandjean, 1946 | | 1 | Species | Taxom |
| Crotoniidae Thorell, 1876 | | 2 | Species | Taxom |
| Ctenacaridae Grandjean, 1954 | | 1 | Species | Taxom |
| Ctenidae Keyserling, 1877 | Tropical wolf spiders | 5 | Species | Taxom |
| Ctenizidae Thorell, 1887 | Cork-lid trapdoor spider | 1 | Species | Taxom |
| Cunaxidae Thor, 1902 | Predatory Mites | 1 | Species | Taxom |
| Cymbaeremaeidae Sellnick, 1928 | | 1 | Species | Taxom |
| Cyrtaucheniidae Simon, 1892 | Cyrtaucheiid spiders | 1 | Species | Taxom |
| Deinopidae C. L. Koch, 1850 | Net-casters | 1 | Species | Taxom |
| Demodecidae Nicolet, 1855 | Follicle mites | 1 | Species | Taxom |
| Desidae Pocock, 1895 | Desid spiders | 1 | Species | Taxom |
| Dictynidae O. P-Cambridge, 1871 | Dictynid spiders | 14 | Species | Taxom |
| Diguetidae F. O. Pickar..., 1899 | Coneweb spiders | 2 | Species | Taxom |
| Dipluridae Simon, 1889 | Curtainweb Spiders | 3 | Species | Taxom |
| Dysderidae C. L. Koch, 1837 | Dysderid spiders | 2 | Species | Taxom |
| Epilohmanniidae Oudemans, 1923 | | 1 | Species | Taxom |
| Eremobatidae Kraepelin, 1899 | | 33 | Species | Taxom |
| Ereynetidae Schrank, 1776 | | 1 | Species | Taxom |
| Eriophyidae Nalepa, 1898 | Blister mites | 1 | Species | Taxom |
| Euphthiracaridae Jacot, 1930 | | 1 | Species | Taxom |
| Eviphididae Berlese, 1913 | | 1 | Species | Taxom |
| Fedrizziidae Trägårdh, 1937 | | 1 | Species | Taxom |
| Filistatidae Ausserer, 1867 | Crevice weaver | 8 | Species | Taxom |
| Gabuciniidae Gaud & Atyeo, 1975 | | 0 | Species | Taxom |
| Galumnidae Jacot, 1925 | | 0 | Species | Taxom |
| Garypidae Simon, 1879 | | 7 | Species | Taxom |
| Garypinidae Daday, 1888 | | 5 | Species | Taxom |
| Geogarypidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Glycyphagidae De Geer, 1778 | | 1 | Species | Taxom |
| Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 47 | Species | Taxom |
| Guanolichidae Fain, 1968 | | 0 | Species | Taxom |
| Hadruridae Stahnke, 1974 | | 6 | Species | Taxom |
| Halonoproctidae Pocock, 1901 | | 1 | Species | Taxom |
| Haplozetidae Grandjean, 1936 | | 1 | Species | Taxom |
| Harpirhynchidae Dubinin, 1957 | | 1 | Species | Taxom |
| Hersiliidae Thorell, 1870 | Hersiliids | 1 | Species | Taxom |
| Hesperolpiidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Histiostomatidae Berlese, 1897 | | 1 | Species | Taxom |
| Homalonychidae Simon, 1893 | Dusty desert spiders | 2 | Species | Taxom |
| Hubbardiidae Cook, 1899 | Hubbardiid shorttailed whipscorpions | 6 | Species | Taxom |
| Hydrozetidae Grandjean, 1954 | | 1 | Species | Taxom |
| Hydryphantidae Piersig, 1896 | | 1 | Species | Taxom |
| Hygrobatidae Koch, 1842 | | 2 | Species | Taxom |
| Ideoroncidae Chamberlin, 1930 | | 4 | Species | Taxom |
| Ixodidae C. L. Koch, 1844 | Hard Tick | 15 | Species | Taxom |
| Johnstonianidae Thor, 1935 | | 1 | Species | Taxom |
| Laelapidae Berlese, 1892 | | 1 | Species | Taxom |
| Laminosioptidae Vitzthum, 1931 | | 1 | Species | Taxom |
| Leeuwenhoekiidae Womersley, 1944 | Chigger mites | 0 | Species | Taxom |
| Leptolaelapidae Karg, 1978 | | 1 | Species | Taxom |
| Leptonetidae Simon, 1890 | Cave spiders | 2 | Species | Taxom |
| Linyphiidae Blackwall, 1859 | Dwarf spiders | 16 | Species | Taxom |
| Liocranidae Simon, 1897 | Liocranid sac spiders | 1 | Species | Taxom |
| Listrophoridae Mégnin & Tro..., 1884 | | 3 | Species | Taxom |
| Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 35 | Species | Taxom |
| Macrochelidae Vitzthum, 1930 | | 1 | Species | Taxom |
| Macronyssidae Oudemans, 1936 | Macronyssid Mites | 3 | Species | Taxom |
| Menthidae J.C. Chamberlin, 1930 | | 1 | Species | Taxom |
| Mimetidae Simon, 1881 | Pirate spider | 3 | Species | Taxom |
| Miturgidae Simon, 1885 | Long-legged sac spiders | 9 | Species | Taxom |
| Mochlozetidae Grandjean, 1960 | | 0 | Species | Taxom |
| Nemastomatidae Simon, 1872 | | 1 | Species | Taxom |
| Neobisiidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Nesticidae Simon, 1894 | Cave cobweb spider | 1 | Species | Taxom |
| Ochyroceratidae Fage, 1912 | Midget ground weaver | 0 | Species | Taxom |
| Oecobiidae Blackwall, 1862 | Disc web spider | 4 | Species | Taxom |
| Olpiidae Banks, 1895 | | 1 | Species | Taxom |
| Oonopidae Simon, 1890 | Dwarf Cell Spiders | 12 | Species | Taxom |
| Opilioacaridae With, 1902 | | 2 | Species | Taxom |
| Oribatellidae Jacot, 1925 | | 1 | Species | Taxom |
| Oribotritiidae Grandjean, 1954 | | 2 | Species | Taxom |
| Orsolobidae Cooke, 1965 | Orsolobid spiders | 1 | Species | Taxom |
| Otopheidomenidae Treat, 1955 | | 0 | Species | Taxom |
| Oxyopidae Thorell, 1870 | Lynx spiders | 14 | Species | Taxom |
| Pachylaelapidae Berlese, 1913 | | 1 | Species | Taxom |
| Paranonychidae (Briggs, 1971) | | 1 | Species | Taxom |
| Parasitidae Oudemans, 1901 | Beetle Mites | 2 | Species | Taxom |
| Paratropididae Simon, 1889 | Bald-legged spiders | 0 | Species | Taxom |
| Passalozetidae Grandjean, 1954 | | 0 | Species | Taxom |
| Phalangodidae Simon, 1879 | | 1 | Species | Taxom |
| Phenopelopidae Petrunkevitch, 1955 | | 1 | Species | Taxom |
| Philodromidae Thorell, 1870 | False crab spiders | 8 | Species | Taxom |
| Pholcidae C. L. Koch, 1851 | Carpenter spider | 19 | Species | Taxom |
| Phrynidae Blanchard, 1852 | | 8 | Species | Taxom |
| Phthiracaridae Perty, 1841 | | 1 | Species | Taxom |
| Phytoseiidae Berlese, 1916 | Phytoseiid mites | 1 | Species | Taxom |
| Pisauridae Simon, 1890 | Big wolf spider | 7 | Species | Taxom |
| Plectreuridae Simon, 1893 | Plectreurid spider | 7 | Species | Taxom |
| Proctophyllodidae Trouessart &..., 1884 | | 1 | Species | Taxom |
| Protoschizomidae Rowland, 1975 | | 6 | Species | Taxom |
| Psoroptidae Hering, 1838 | Scab mites | 2 | Species | Taxom |
| Psoroptoididae Gaud, 1958 | | 1 | Species | Taxom |
| Pterolichidae Trouessart, 1899 | | 0 | Species | Taxom |
| Pterygosomatidae Womersley, 1941 | | 1 | Species | Taxom |
| Pyroglyphidae Cunliffe, 1958 | Dust mites | 1 | Species | Taxom |
| Raillietiidae Vitzthum, 1943 | | 0 | Species | Taxom |
| Raphignathidae Kramer, 1877 | | 1 | Species | Taxom |
| Ricinoididae Ewing, 1929 | Hooded tickspiders | 5 | Species | Taxom |
| Salticidae Blackwall, 1842 | Jumping Spider | 112 | Species | Taxom |
| Sarcoptidae Megnin, 1877 | Itch mites | 1 | Species | Taxom |
| Scheloribatidae Jacot, 1935 | | 1 | Species | Taxom |
| Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 14 | Species | Taxom |
| Scorpionidae Pierre André..., 1802 | Largeclaw scorpions | 10 | Species | Taxom |
| Scytodidae Blackwall, 1864 | Glue spitter | 8 | Species | Taxom |
| Segestriidae Simon, 1893 | Six-eyed Spiders | 5 | Species | Taxom |
| Selenopidae Simon, 1897 | Flatties | 4 | Species | Taxom |
| Senoculidae Simon, 1890 | Senoculid spiders | 0 | Species | Taxom |
| Sicariidae Keyserling, 1880 | Brown recluse spiders | 9 | Species | Taxom |
| Sparassidae Bertkau, 1872 | Giant crab spiders | 8 | Species | Taxom |
| Spinturnicidae Oudemans, 1902 | | 1 | Species | Taxom |
| Sternophoridae J.C. Chamberlin, 1923 | | 1 | Species | Taxom |
| Stygnopsidae Sørensen, 1932 | | 0 | Species | Taxom |
| Superstitioniidae Stahnke, 1940 | | 2 | Species | Taxom |
| Syarinidae Chamberlin, 1930 | | 2 | Species | Taxom |
| Syringophilidae Lavoipierre, 1953 | Quill mites | 4 | Species | Taxom |
| Tanaupodidae Thor, 1935 | | 1 | Species | Taxom |
| Tarsonemidae Kramer, 1877 | Tarsonemid mites | 9 | Species | Taxom |
| Tectocepheidae Grandjean, 1954 | | 1 | Species | Taxom |
| Tenuipalpidae Berlese, 1913 | False spider mites | 3 | Species | Taxom |
| Tetrablemmidae O. P-Cambridge, 1873 | Armored spider | 3 | Species | Taxom |
| Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 16 | Species | Taxom |
| Tetranychidae Donnadieu, 1875 | Spider mites | 11 | Species | Taxom |
| Thelyphonidae Lucas, 1835 | | 1 | Species | Taxom |
| Theraphosidae Thorell, 1870 | Bird-eating spiders | 14 | Species | Taxom |
| Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 39 | Species | Taxom |
| Thomisidae Sundevall, 1833 | Crab Spider | 23 | Species | Taxom |
| Titanoecidae Lehtinen, 1967 | Rock Weavers | 2 | Species | Taxom |
| Trachyuropodidae Kramer, 1881 | | 0 | Species | Taxom |
| Trechaleidae Simon, 1890 | Trechaleid spiders | 1 | Species | Taxom |
| Trematuridae Berlese, 1917 | | 4 | Species | Taxom |
| Trhypochthoniidae Willmann, 1931 | | 1 | Species | Taxom |
| Trombiculidae Ewing, 1929 | Chigger mites | 2 | Species | Taxom |
| Trombidiidae Leach, 1815 | Beer Bahuti | 0 | Species | Taxom |
| Tuckerellidae Baker & Prit..., 1953 | Peacock mites | 0 | Species | Taxom |
| Uloboridae Thorell, 1869 | Cribellate orb weavers | 4 | Species | Taxom |
| Urodinychidae Berlese, 1917 | | 0 | Species | Taxom |
| Uropodidae Kramer, 1881 | | 0 | Species | Taxom |
| Vaejovidae Thorell, 1876 | | 52 | Species | Taxom |
| Winterschmidtiidae Oudemans, 1923 | | 0 | Species | Taxom |
| Withiidae Chamberlin, 1931 | | 1 | Species | Taxom |
| Xolalgidae Dubinin, 1953 | | 0 | Species | Taxom |
| Zalmoxidae (Sörensen, 1886) | | 0 | Species | Taxom |
| Zodariidae Thorell, 1881 | Ant spiders | 1 | Species | Taxom |
| Zorocratidae (Dahl, 1913) | Zorocratid spider | 2 | Species | Taxom |
