| Acaridae Latreille, 1802 | Acarid mites | 3 | Species | Taxom |
| Acaronychidae Grandjean, 1932 | | 1 | Species | Taxom |
| Adelphacaridae Grandjean, 1954 | | 0 | Species | Taxom |
| Aleurodamaeidae Paschoal & J..., 1985 | | 2 | Species | Taxom |
| Alycidae Canestrini &..., 1877 | | 1 | Species | Taxom |
| Amblyommidae Banks, 1907 | | 10 | Species | Taxom |
| Ameronothridae Willmann, 1931 | | 1 | Species | Taxom |
| Ameroseiidae Evans, 1961 | | 1 | Species | Taxom |
| Ammotrechidae Roewer, 1934 | Curve-faced solifugid | 3 | Species | Taxom |
| Anderemaeidae Balogh, 1972 | | 3 | Species | Taxom |
| Anyphaenidae Bertkau, 1878 | Anyphaenid sac spiders | 0 | Species | Taxom |
| Anystidae Oudemans, 1936 | Whirligig Mites | 0 | Species | Taxom |
| Araneidae Simon, 1895 | Golden orb web spiders | 38 | Species | Taxom |
| Arceremaeidae Balogh, 1972 | | 2 | Species | Taxom |
| Argasidae C. L. Koch, 1844 | Soft tick | 5 | Species | Taxom |
| Arrenuridae Thor, 1900 | | 0 | Species | Taxom |
| Ascidae Oudemans, 1905 | | 5 | Species | Taxom |
| Ascouracaridae Gaud & Atyeo, 1976 | | 0 | Species | Taxom |
| Astegistidae Balogh, 1961 | | 1 | Species | Taxom |
| Atopochthoniidae Grandjean, 1949 | | 2 | Species | Taxom |
| Autognetidae Grandjean, 1960 | | 1 | Species | Taxom |
| Basilobelbidae Balogh, 1961 | | 2 | Species | Taxom |
| Bdellidae Dugès, 1834 | Snout Mites | 8 | Species | Taxom |
| Blattisociidae (Garman, 1948) | | 2 | Species | Taxom |
| Bochicidae Chamberlin, 1930 | | 8 | Species | Taxom |
| Brachychthoniidae Thor, 1934 | | 6 | Species | Taxom |
| Buthidae C. L. Koch, 1837 | Arrowbreasted scorpions | 10 | Species | Taxom |
| Caeculidae Berlese, 1883 | Rake-legged mites | 1 | Species | Taxom |
| Caligonellidae Grandjean, 1944 | | 0 | Species | Taxom |
| Camerobiidae Southcott, 1957 | Stilt-legged mites | 1 | Species | Taxom |
| Caponiidae Simon, 1890 | Caponiid spiders | 2 | Species | Taxom |
| Carabodidae Koch, 1837 | | 17 | Species | Taxom |
| Ceratokalummidae Balogh, 1970 | | 0 | Species | Taxom |
| Ceratoppiidae (Kunst, 1971) | | 2 | Species | Taxom |
| Ceratozetidae Jacot, 1925 | | 7 | Species | Taxom |
| Charassobatidae Grandjean, 1958 | | 5 | Species | Taxom |
| Cheliferidae Risso, 1826 | | 1 | Species | Taxom |
| Chernetidae Menge, 1855 | | 7 | Species | Taxom |
| Cheyletidae Leach, 1815 | | 2 | Species | Taxom |
| Chthoniidae Daday, 1888 | | 5 | Species | Taxom |
| Chyzeriidae Womersley, 1954 | | 0 | Species | Taxom |
| Cocceupodidae Jesionowska, 2010 | | 1 | Species | Taxom |
| Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 1 | Species | Taxom |
| Cosmetidae C. L. Koch, 1839 | | 2 | Species | Taxom |
| Cosmochthoniidae Grandjean, 1946 | | 3 | Species | Taxom |
| Crotoniidae Thorell, 1876 | | 2 | Species | Taxom |
| Cryptognathidae Luxton, 1973 | | 2 | Species | Taxom |
| Ctenacaridae Grandjean, 1954 | | 3 | Species | Taxom |
| Ctenidae Keyserling, 1877 | Tropical wolf spiders | 4 | Species | Taxom |
| Cunaxidae Thor, 1902 | Predatory Mites | 6 | Species | Taxom |
| Cymbaeremaeidae Sellnick, 1928 | | 5 | Species | Taxom |
| Damaeidae Berlese, 1896 | | 1 | Species | Taxom |
| Damaeolidae Grandjean, 1965 | | 0 | Species | Taxom |
| Dampfiellidae Balogh, 1961 | | 7 | Species | Taxom |
| Deinopidae C. L. Koch, 1850 | Net-casters | 1 | Species | Taxom |
| Deraiophoridae Trägårdh, 1952 | | 0 | Species | Taxom |
| Dermanyssidae Kolenati, 1859 | Dermanyssid mites | 0 | Species | Taxom |
| Digamasellidae Evans, 1957 | | 1 | Species | Taxom |
| Drymobatidae J. & P. Balogh, 1984 | | 1 | Species | Taxom |
| Dysderidae C. L. Koch, 1837 | Dysderid spiders | 1 | Species | Taxom |
| Eniochthoniidae Grandjean, 1947 | | 1 | Species | Taxom |
| Epilohmanniidae Oudemans, 1923 | | 2 | Species | Taxom |
| Eremaeozetidae Piffl, 1972 | | 4 | Species | Taxom |
| Eremobelbidae Balogh, 1961 | | 1 | Species | Taxom |
| Eremulidae Grandjean, 1965 | | 6 | Species | Taxom |
| Ereynetidae Schrank, 1776 | | 2 | Species | Taxom |
| Erythraeidae Oudemans, 1902 | | 1 | Species | Taxom |
| Eukoeneniidae Condé, 1965 | | 0 | Species | Taxom |
| Euphthiracaridae Jacot, 1930 | | 5 | Species | Taxom |
| Eupodidae Strandtmann, 1967 | Eupodid mites | 0 | Species | Taxom |
| Eviphididae Berlese, 1913 | | 1 | Species | Taxom |
| Eylaidae Leach, 1815 | | 0 | Species | Taxom |
| Fedrizziidae Trägårdh, 1937 | | 1 | Species | Taxom |
| Filistatidae Ausserer, 1867 | Crevice weaver | 1 | Species | Taxom |
| Galumnidae Jacot, 1925 | | 18 | Species | Taxom |
| Garypidae Simon, 1879 | | 1 | Species | Taxom |
| Garypinidae Daday, 1888 | | 1 | Species | Taxom |
| Glycyphagidae De Geer, 1778 | | 1 | Species | Taxom |
| Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 1 | Species | Taxom |
| Grandjeanicidae Kethley, 1977 | | 0 | Species | Taxom |
| Gymnodamaeidae Grandjean, 1954 | | 3 | Species | Taxom |
| Hahniidae Bertkau, 1878 | Dwarf sheet spiders | 1 | Species | Taxom |
| Halacaridae Murray, 1877 | Sea mites | 1 | Species | Taxom |
| Halolaelapidae Karg, 1965 | | 1 | Species | Taxom |
| Hammeriellidae Paschoal, 1989 | | 0 | Species | Taxom |
| Haplochthoniidae Van der Hammen, 1959 | | 1 | Species | Taxom |
| Haplozetidae Grandjean, 1936 | | 10 | Species | Taxom |
| Hemileiidae (J. & P. Balogh, 1984) | | 0 | Species | Taxom |
| Hermanniellidae Grandjean, 1934 | | 6 | Species | Taxom |
| Hersiliidae Thorell, 1870 | Hersiliids | 2 | Species | Taxom |
| Heterobelbidae Balogh, 1961 | | 1 | Species | Taxom |
| Heterozerconidae Berlese, 1892 | | 0 | Species | Taxom |
| Histiostomatidae Berlese, 1897 | | 1 | Species | Taxom |
| Hubbardiidae Cook, 1899 | Hubbardiid shorttailed whipscorpions | 7 | Species | Taxom |
| Humerobatidae Grandjean, 1970 | | 1 | Species | Taxom |
| Hyadesiidae Halbert, 1915 | | 0 | Species | Taxom |
| Hydrozetidae Grandjean, 1954 | | 0 | Species | Taxom |
| Hygrobatidae Koch, 1842 | | 0 | Species | Taxom |
| Hypochthoniidae Berlese, 1910 | | 5 | Species | Taxom |
| Idiopidae Simon, 1892 | Armored trapdoor spiders | 1 | Species | Taxom |
| Iolinidae Pritchard, 1956 | | 0 | Species | Taxom |
| Ixodidae C. L. Koch, 1844 | Hard Tick | 2 | Species | Taxom |
| Johnstonianidae Thor, 1935 | | 1 | Species | Taxom |
| Laelapidae Berlese, 1892 | | 3 | Species | Taxom |
| Leeuwenhoekiidae Womersley, 1944 | Chigger mites | 0 | Species | Taxom |
| Liacaridae Sellnick, 1928 | | 1 | Species | Taxom |
| Licneremaeidae Grandjean, 1931 | | 3 | Species | Taxom |
| Licnodamaeidae (Grandjean, 1954) | | 4 | Species | Taxom |
| Liebstadiidae J. & P. Balogh, 1984 | | 0 | Species | Taxom |
| Limnesiidae Thor, 1900 | | 0 | Species | Taxom |
| Linyphiidae Blackwall, 1859 | Dwarf spiders | 2 | Species | Taxom |
| Listrophoridae Mégnin & Tro..., 1884 | | 0 | Species | Taxom |
| Lohmanniidae Berlese, 1916 | | 14 | Species | Taxom |
| Lordalychidae Grandjean, 1939 | | 1 | Species | Taxom |
| Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 2 | Species | Taxom |
| Machadobelbidae Balogh, 1972 | | 1 | Species | Taxom |
| Machuellidae Balogh, 1983 | | 1 | Species | Taxom |
| Macrochelidae Vitzthum, 1930 | | 1 | Species | Taxom |
| Macrodinychidae Hirschmann, 1979 | | 0 | Species | Taxom |
| Macronyssidae Oudemans, 1936 | Macronyssid Mites | 0 | Species | Taxom |
| Malaconothridae Berlese, 1916 | | 13 | Species | Taxom |
| Mesoplophoridae Ewing, 1917 | | 1 | Species | Taxom |
| Microtegeidae Balogh, 1972 | | 6 | Species | Taxom |
| Microtrombidiidae Womersley, 1936 | Micro velvet mites | 1 | Species | Taxom |
| Microzetidae Grandjean, 1936 | | 15 | Species | Taxom |
| Mideopsidae Koenike, 1910 | | 0 | Species | Taxom |
| Mimetidae Simon, 1881 | Pirate spider | 2 | Species | Taxom |
| Mochlozetidae Grandjean, 1960 | | 4 | Species | Taxom |
| Multoribulidae Balogh, 1972 | | 1 | Species | Taxom |
| Mysmenidae Petrunkevitch, 1928 | Dwarf cobweb spiders | 1 | Species | Taxom |
| Nanhermanniidae Sellnick, 1928 | | 4 | Species | Taxom |
| Nanorchestidae Luxton, 1984 | | 0 | Species | Taxom |
| Neoliodidae (Sellnick, 1928) | | 3 | Species | Taxom |
| Nesticidae Simon, 1894 | Cave cobweb spider | 1 | Species | Taxom |
| Nothridae Berlese, 1896 | | 10 | Species | Taxom |
| Oehserchestidae Kethley, 1977 | | 0 | Species | Taxom |
| Ologamasidae Ryke, 1962 | | 1 | Species | Taxom |
| Olpiidae Banks, 1895 | | 1 | Species | Taxom |
| Oonopidae Simon, 1890 | Dwarf Cell Spiders | 3 | Species | Taxom |
| Opilioacaridae With, 1902 | | 5 | Species | Taxom |
| Oppiidae Sellnick, 1937 | | 26 | Species | Taxom |
| Oribatellidae Jacot, 1925 | | 8 | Species | Taxom |
| Oribatulidae Thor, 1929 | | 0 | Species | Taxom |
| Oribotritiidae Grandjean, 1954 | | 3 | Species | Taxom |
| Oripodidae Jacot, 1925 | | 7 | Species | Taxom |
| Otocepheidae Balogh, 1961 | | 0 | Species | Taxom |
| Oxyopidae Thorell, 1870 | Lynx spiders | 3 | Species | Taxom |
| Pachylaelapidae Berlese, 1913 | | 2 | Species | Taxom |
| Paramegistidae Trägårdh, 1946 | | 1 | Species | Taxom |
| Parasitidae Oudemans, 1901 | Beetle Mites | 2 | Species | Taxom |
| Paratydeidae Baker, 1949 | | 0 | Species | Taxom |
| Parholaspididae Evans, 1956 | | 0 | Species | Taxom |
| Parhypochthoniidae Grandjean, 1932 | | 1 | Species | Taxom |
| Penthaleidae Oudemans, 1931 | Earth Mites | 1 | Species | Taxom |
| Penthalodidae Strandtmann, 1964 | | 0 | Species | Taxom |
| Perlohmanniidae Grandjean, 1954 | | 0 | Species | Taxom |
| Phaulodinychidae (Berlese, 1917) | | 0 | Species | Taxom |
| Phenopelopidae Petrunkevitch, 1955 | | 2 | Species | Taxom |
| Pheroliodidae Paschoal, 1987 | | 3 | Species | Taxom |
| Pholcidae C. L. Koch, 1851 | Carpenter spider | 3 | Species | Taxom |
| Phrynidae Blanchard, 1852 | | 7 | Species | Taxom |
| Phthiracaridae Perty, 1841 | | 6 | Species | Taxom |
| Phytoseiidae Berlese, 1916 | Phytoseiid mites | 3 | Species | Taxom |
| Pisauridae Simon, 1890 | Big wolf spider | 1 | Species | Taxom |
| Plasmobatidae Grandjean, 1961 | | 2 | Species | Taxom |
| Plateremaeidae Trägårdh, 1931 | | 5 | Species | Taxom |
| Podocinidae Berlese, 1913 | | 0 | Species | Taxom |
| Polyaspididae Berlese, 1913 | | 3 | Species | Taxom |
| Proctophyllodidae Trouessart &..., 1884 | | 0 | Species | Taxom |
| Protoplophoridae (Ewing, 1917) | | 4 | Species | Taxom |
| Protoribatidae J. & P. Balogh, 1984 | | 6 | Species | Taxom |
| Pseudocheylidae Oudemans, 1909 | | 0 | Species | Taxom |
| Pterolichidae Trouessart, 1899 | | 1 | Species | Taxom |
| Pterygosomatidae Womersley, 1941 | | 2 | Species | Taxom |
| Punctoribatidae Thor, 1937 | | 2 | Species | Taxom |
| Pyemotidae Newport, 1850 | | 0 | Species | Taxom |
| Pygmephoridae Krczal, 1964 | | 0 | Species | Taxom |
| Pyrosejidae Lindquist & ..., 1993 | | 0 | Species | Taxom |
| Quadroppiidae Balogh, 1983 | | 0 | Species | Taxom |
| Raphignathidae Kramer, 1877 | | 0 | Species | Taxom |
| Rhagidiidae Zacharda, 1980 | | 1 | Species | Taxom |
| Rhodacaridae Oudemans, 1902 | | 2 | Species | Taxom |
| Ricinoididae Ewing, 1929 | Hooded tickspiders | 1 | Species | Taxom |
| Salticidae Blackwall, 1842 | Jumping Spider | 63 | Species | Taxom |
| Samoidae Sørensen, 1886 | | 0 | Species | Taxom |
| Scheloribatidae Jacot, 1935 | | 9 | Species | Taxom |
| Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 1 | Species | Taxom |
| Scorpionidae Pierre André..., 1802 | Largeclaw scorpions | 6 | Species | Taxom |
| Scutacaridae Paoli, 1911 | | 1 | Species | Taxom |
| Scutoverticidae Grandjean, 1954 | | 1 | Species | Taxom |
| Scytodidae Blackwall, 1864 | Glue spitter | 1 | Species | Taxom |
| Senoculidae Simon, 1890 | Senoculid spiders | 1 | Species | Taxom |
| Sicariidae Keyserling, 1880 | Brown recluse spiders | 1 | Species | Taxom |
| Siteroptidae Martin, 1978 | Siteroptid mites | 1 | Species | Taxom |
| Smarididae Kramer, 1878 | | 0 | Species | Taxom |
| Sparassidae Bertkau, 1872 | Giant crab spiders | 3 | Species | Taxom |
| Sphaerochthoniidae Grandjean, 1947 | | 2 | Species | Taxom |
| Sphaerolichidae Berlese, 1913 | | 1 | Species | Taxom |
| Staurobatidae Grandjean, 1966 | | 1 | Species | Taxom |
| Stigmaeidae Wood, 1967 | | 2 | Species | Taxom |
| Suctobelbidae Jacot, 1938 | | 4 | Species | Taxom |
| Syarinidae Chamberlin, 1930 | | 1 | Species | Taxom |
| Syringobiidae Trouessart, 1897 | | 0 | Species | Taxom |
| Tanaupodidae Thor, 1935 | | 1 | Species | Taxom |
| Tarsonemidae Kramer, 1877 | Tarsonemid mites | 1 | Species | Taxom |
| Tectocepheidae Grandjean, 1954 | | 1 | Species | Taxom |
| Teneriffiidae Thor, 1911 | | 0 | Species | Taxom |
| Tengellidae (Dahl, 1908) | Tengellid spiders | 0 | Species | Taxom |
| Tenuipalpidae Berlese, 1913 | False spider mites | 2 | Species | Taxom |
| Teratoppiidae Balogh, 1983 | | 2 | Species | Taxom |
| Terpnacaridae Grandjean, 1939 | | 0 | Species | Taxom |
| Tetrablemmidae O. P-Cambridge, 1873 | Armored spider | 0 | Species | Taxom |
| Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 7 | Species | Taxom |
| Tetranychidae Donnadieu, 1875 | Spider mites | 1 | Species | Taxom |
| Theraphosidae Thorell, 1870 | Bird-eating spiders | 3 | Species | Taxom |
| Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 38 | Species | Taxom |
| Theridiosomatidae Simon, 1881 | Ray orbweavers | 3 | Species | Taxom |
| Thomisidae Sundevall, 1833 | Crab Spider | 4 | Species | Taxom |
| Thyrisomidae Grandjean, 1953 | | 1 | Species | Taxom |
| Trachyuropodidae Kramer, 1881 | | 4 | Species | Taxom |
| Trematuridae Berlese, 1917 | | 0 | Species | Taxom |
| Trhypochthoniidae Willmann, 1931 | | 8 | Species | Taxom |
| Trigonuropodidae Hirschmann, 1979 | | 0 | Species | Taxom |
| Trizetidae Ewing, 1917 | | 1 | Species | Taxom |
| Trombellidae Thor, 1935 | | 0 | Species | Taxom |
| Trombiculidae Ewing, 1929 | Chigger mites | 1 | Species | Taxom |
| Trombidiidae Leach, 1815 | Beer Bahuti | 0 | Species | Taxom |
| Uloboridae Thorell, 1869 | Cribellate orb weavers | 0 | Species | Taxom |
| Unionicolidae Oudemans, 1909 | | 0 | Species | Taxom |
| Uroactiniidae Hirschmann &..., 1964 | | 0 | Species | Taxom |
| Urodinychidae Berlese, 1917 | | 0 | Species | Taxom |
| Uropodidae Kramer, 1881 | | 1 | Species | Taxom |
| Vaejovidae Thorell, 1876 | | 1 | Species | Taxom |
| Veigaiidae Oudemans, 1939 | | 1 | Species | Taxom |
| Winterschmidtiidae Oudemans, 1923 | | 0 | Species | Taxom |
| Xenillidae Woolley & Hi..., 1966 | | 8 | Species | Taxom |
| Zalmoxidae (Sörensen, 1886) | | 1 | Species | Taxom |
| Zerconidae Berlese, 1892 | | 0 | Species | Taxom |
| Zetorchestidae Michael, 1898 | | 2 | Species | Taxom |
