| Acaridae Latreille, 1802 | Vorratsmilben | 28 | Arten | Taxom |
| Acaronychidae Grandjean, 1932 | | 4 | Arten | Taxom |
| Achipteriidae Thor, 1929 | | 9 | Arten | Taxom |
| Adhaesozetidae Hammer, 1973 | | 1 | Art | Taxom |
| Agelenidae C. L. Koch, 1837 | Trichternetzspinnen | 66 | Arten | Taxom |
| Alicorhagiidae Grandjean, 1939 | | 1 | Art | Taxom |
| Alloptidae Gaud, 1957 | | 2 | Arten | Taxom |
| Allotanaupodidae Zhang & Fan, 2007 | | 2 | Arten | Taxom |
| Allothyridae Van der Hammen, 1972 | | 1 | Art | Taxom |
| Alycidae Canestrini &..., 1877 | | 1 | Art | Taxom |
| Amaurobiidae Thorell, 1870 | Fensterspinnen | 40 | Arten | Taxom |
| Amblyommidae Banks, 1907 | | 11 | Arten | Taxom |
| Ameridae Grandjean, 1965 | | 3 | Arten | Taxom |
| Ameronothridae Willmann, 1931 | | 12 | Arten | Taxom |
| Ameroseiidae Evans, 1961 | | 4 | Arten | Taxom |
| Amphinectidae Forster & Wi..., 1973 | | 117 | Arten | Taxom |
| Analgidae Trouessart &..., 1884 | | 8 | Arten | Taxom |
| Anamidae Simon, 1889 | | 10 | Arten | Taxom |
| Anapidae Simon, 1895 | Zwergkugelspinnen | 15 | Arten | Taxom |
| Anderemaeidae Balogh, 1972 | | 1 | Art | Taxom |
| Anisitsiellidae Koenike, 1910 | | 6 | Arten | Taxom |
| Antrodiaetidae Gertsch, 1940 | | 1 | Art | Taxom |
| Anyphaenidae Bertkau, 1878 | Zartspinnen | 11 | Arten | Taxom |
| Anystidae Oudemans, 1936 | | 2 | Arten | Taxom |
| Araneidae Simon, 1895 | Echte Radnetzspinnen | 105 | Arten | Taxom |
| Argasidae C. L. Koch, 1844 | Lederzecken | 6 | Arten | Taxom |
| Arrenuridae Thor, 1900 | | 3 | Arten | Taxom |
| Ascidae Oudemans, 1905 | | 10 | Arten | Taxom |
| Assamiidae Sørensen, 1884 | | 1 | Art | Taxom |
| Astegistidae Balogh, 1961 | | 2 | Arten | Taxom |
| Atemnidae Chamberlin, 1931 | | 1 | Art | Taxom |
| Athienemanniidae Viets, 1922 | | 1 | Art | Taxom |
| Atopomelidae Fain, 1972 | | 9 | Arten | Taxom |
| Aturidae Thor, 1900 | | 49 | Arten | Taxom |
| Austrachipteriidae (Luxton, 1985) | | 1 | Art | Taxom |
| Autognetidae Grandjean, 1960 | | 2 | Arten | Taxom |
| Avenzoariidae Oudemans, 1905 | | 3 | Arten | Taxom |
| Barychelidae Simon, 1889 | | 4 | Arten | Taxom |
| Bdellidae Dugès, 1834 | Schnabelmilben | 19 | Arten | Taxom |
| Blattisociidae (Garman, 1948) | | 10 | Arten | Taxom |
| Bothriuridae Simon, 1880 | | 1 | Art | Taxom |
| Brachychthoniidae Thor, 1934 | | 8 | Arten | Taxom |
| Buthidae C. L. Koch, 1837 | Skorpione | 6 | Arten | Taxom |
| Caddidae Banks, 1892 | | 2 | Arten | Taxom |
| Caeculidae Berlese, 1883 | | 1 | Art | Taxom |
| Caligonellidae Grandjean, 1944 | | 5 | Arten | Taxom |
| Caloppiidae (Balogh, 1960) | | 2 | Arten | Taxom |
| Camerobiidae Southcott, 1957 | | 7 | Arten | Taxom |
| Camisiidae Oudemans, 1900 | | 5 | Arten | Taxom |
| Canestriniidae Berlese, 1884 | | 1 | Art | Taxom |
| Carabodidae Koch, 1837 | | 7 | Arten | Taxom |
| Carpoglyphidae Oudemans, 1923 | | 1 | Art | Taxom |
| Cepheusidae Berlese, 1896 | | 5 | Arten | Taxom |
| Ceratokalummidae Balogh, 1970 | | 1 | Art | Taxom |
| Ceratoppiidae (Kunst, 1971) | | 7 | Arten | Taxom |
| Ceratozetidae Jacot, 1925 | | 12 | Arten | Taxom |
| Cerocepheidae Subías, 2004 | | 3 | Arten | Taxom |
| Chaetodactylidae Zakhvatkin, 1941 | | 1 | Art | Taxom |
| Chamobatidae Thor, 1937 | | 3 | Arten | Taxom |
| Charontidae Simon, 1892 | | 2 | Arten | Taxom |
| Cheiracanthiidae Wagner, 1887 | Dornfingerspinnen | 1 | Art | Taxom |
| Cheiridiidae Hansen, 1893 | | 4 | Arten | Taxom |
| Cheliferidae Risso, 1826 | | 11 | Arten | Taxom |
| Chernetidae Menge, 1855 | | 51 | Arten | Taxom |
| Cheyletidae Leach, 1815 | Raubmilben | 31 | Arten | Taxom |
| Chirodiscidae Trouessart, 1892 | | 0 | Arten | Taxom |
| Chortoglyphidae Berlese, 1897 | | 1 | Art | Taxom |
| Chthoniidae Daday, 1888 | | 32 | Arten | Taxom |
| Chyzeriidae Womersley, 1954 | | 1 | Art | Taxom |
| Clubionidae Wagner, 1887 | Sackspinnen | 26 | Arten | Taxom |
| Cocceupodidae Jesionowska, 2010 | | 2 | Arten | Taxom |
| Corinnidae Karsch, 1880 | Dunkelsackspinnen | 11 | Arten | Taxom |
| Cosmochthoniidae Grandjean, 1946 | | 1 | Art | Taxom |
| Crotoniidae Thorell, 1876 | | 22 | Arten | Taxom |
| Cryptognathidae Luxton, 1973 | | 9 | Arten | Taxom |
| Ctenacaridae Grandjean, 1954 | | 1 | Art | Taxom |
| Ctenothyadidae Cook & Hopkins, 1998 | | 2 | Arten | Taxom |
| Cunaxidae Thor, 1902 | | 14 | Arten | Taxom |
| Cyatholipidae Simon, 1894 | | 13 | Arten | Taxom |
| Cycloctenidae Simon, 1898 | | 54 | Arten | Taxom |
| Cymbaeremaeidae Sellnick, 1928 | | 5 | Arten | Taxom |
| Damaeidae Berlese, 1896 | | 1 | Art | Taxom |
| Damaeolidae Grandjean, 1965 | | 1 | Art | Taxom |
| Deinopidae C. L. Koch, 1850 | | 2 | Arten | Taxom |
| Demodecidae Nicolet, 1855 | | 14 | Arten | Taxom |
| Deraiophoridae Trägårdh, 1952 | | 1 | Art | Taxom |
| Dermanyssidae Kolenati, 1859 | | 7 | Arten | Taxom |
| Dermoglyphidae Mégnin & Tro..., 1884 | | 1 | Art | Taxom |
| Desidae Pocock, 1895 | Gezeitenspinnen | 106 | Arten | Taxom |
| Diarthrophallidae Trägårdh, 1946 | | 1 | Art | Taxom |
| Dictynidae O. P-Cambridge, 1871 | Kräuselspinnen | 15 | Arten | Taxom |
| Digamasellidae Evans, 1957 | | 7 | Arten | Taxom |
| Diptilomiopidae Boczek, 1964 | | 9 | Arten | Taxom |
| Discozerconidae Berlese, 1910 | | 1 | Art | Taxom |
| Dysderidae C. L. Koch, 1837 | Sechsaugen | 4 | Arten | Taxom |
| Echimyopodidae Fain, 1967 | | 2 | Arten | Taxom |
| Eniochthoniidae Grandjean, 1947 | | 1 | Art | Taxom |
| Epidermoptidae Trouessart, 1892 | | 1 | Art | Taxom |
| Epilohmanniidae Oudemans, 1923 | | 1 | Art | Taxom |
| Eremaeidae Oudemans, 1900 | | 1 | Art | Taxom |
| Eremaeozetidae Piffl, 1972 | | 1 | Art | Taxom |
| Eremobatidae Kraepelin, 1899 | | 4 | Arten | Taxom |
| Eremulidae Grandjean, 1965 | | 2 | Arten | Taxom |
| Ereynetidae Schrank, 1776 | | 5 | Arten | Taxom |
| Eriophyidae Nalepa, 1898 | Gallmilben | 167 | Arten | Taxom |
| Erythraeidae Oudemans, 1902 | | 12 | Arten | Taxom |
| Eukoeneniidae Condé, 1965 | | 1 | Art | Taxom |
| Euphthiracaridae Jacot, 1930 | | 13 | Arten | Taxom |
| Eupodidae Strandtmann, 1967 | Laufmilben | 6 | Arten | Taxom |
| Eustathiidae Oudemans, 1905 | | 2 | Arten | Taxom |
| Eutegaeidae Balogh, 1965 | | 12 | Arten | Taxom |
| Eviphididae Berlese, 1913 | | 3 | Arten | Taxom |
| Falculiferidae Oudemans, 1905 | | 3 | Arten | Taxom |
| Fedrizziidae Trägårdh, 1937 | | 1 | Art | Taxom |
| Filistatidae Ausserer, 1867 | Lochröhrenspinnen | 1 | Art | Taxom |
| Fortuyniidae Hammen, 1963 | | 1 | Art | Taxom |
| Gabuciniidae Gaud & Atyeo, 1975 | | 2 | Arten | Taxom |
| Gallieniellidae Millot, 1947 | | 1 | Art | Taxom |
| Galumnidae Jacot, 1925 | | 13 | Arten | Taxom |
| Garypidae Simon, 1879 | | 7 | Arten | Taxom |
| Garypinidae Daday, 1888 | | 3 | Arten | Taxom |
| Geogarypidae Chamberlin, 1930 | | 4 | Arten | Taxom |
| Glycyphagidae De Geer, 1778 | | 5 | Arten | Taxom |
| Gnaphosidae Pocock, 1898 | Glattbauchspinnen | 49 | Arten | Taxom |
| Gradungulidae Forster, 1955 | | 3 | Arten | Taxom |
| Hahniidae Bertkau, 1878 | Bodenspinnen | 29 | Arten | Taxom |
| Halacaridae Murray, 1877 | Meeresmilben | 52 | Arten | Taxom |
| Halarachnidae Oudemans, 1906 | | 2 | Arten | Taxom |
| Hammeriellidae Paschoal, 1989 | | 1 | Art | Taxom |
| Haplozetidae Grandjean, 1936 | | 11 | Arten | Taxom |
| Heatherellidae Walter, 1997 | | 1 | Art | Taxom |
| Hemileiidae (J. & P. Balogh, 1984) | | 2 | Arten | Taxom |
| Hemisarcoptidae Oudemans, 1904 | | 3 | Arten | Taxom |
| Hermanniellidae Grandjean, 1934 | | 4 | Arten | Taxom |
| Hermanniidae Sellnick, 1928 | | 7 | Arten | Taxom |
| Hexathelidae Simon, 1892 | | 25 | Arten | Taxom |
| Histiostomatidae Berlese, 1897 | | 4 | Arten | Taxom |
| Holarchaeidae Forster & Pl..., 1984 | | 1 | Art | Taxom |
| Hormuridae Laurie, 1896 | | 3 | Arten | Taxom |
| Hubbardiidae Cook, 1899 | | 5 | Arten | Taxom |
| Humerobatidae Grandjean, 1970 | | 9 | Arten | Taxom |
| Huttoniidae Simon, 1893 | | 1 | Art | Taxom |
| Hyadesiidae Halbert, 1915 | | 9 | Arten | Taxom |
| Hydrachnidae Leach, 1815 | | 0 | Arten | Taxom |
| Hydrozetidae Grandjean, 1954 | | 1 | Art | Taxom |
| Hydryphantidae Piersig, 1896 | | 5 | Arten | Taxom |
| Hygrobatidae Koch, 1842 | | 16 | Arten | Taxom |
| Hypochthoniidae Berlese, 1910 | | 1 | Art | Taxom |
| Hypoderatidae (Murray, 1877) | | 4 | Arten | Taxom |
| Hypoderidae Murray, 1877 | | 0 | Arten | Taxom |
| Idiopidae Simon, 1892 | | 46 | Arten | Taxom |
| Iolinidae Pritchard, 1956 | | 2 | Arten | Taxom |
| Ixodidae C. L. Koch, 1844 | Holzböcke | 9 | Arten | Taxom |
| Johnstonianidae Thor, 1935 | | 1 | Art | Taxom |
| Kiwilichidae Dabert, 1994 | | 2 | Arten | Taxom |
| Knemidokoptidae (Lavoipierre ..., 1951) | | 4 | Arten | Taxom |
| Kytoditidae (Oudemans, 1908) | | 1 | Art | Taxom |
| Labidostommatidae Oudemans, 1904 | | 10 | Arten | Taxom |
| Laelapidae Berlese, 1892 | | 34 | Arten | Taxom |
| Lamellareidae Balogh, 1972 | | 1 | Art | Taxom |
| Laminosioptidae Vitzthum, 1931 | | 1 | Art | Taxom |
| Lamponidae Simon, 1893 | | 4 | Arten | Taxom |
| Lardoglyphidae Oudemans, 1927 | | 1 | Art | Taxom |
| Leeuwenhoekiidae Womersley, 1944 | | 2 | Arten | Taxom |
| Leptolaelapidae Karg, 1978 | | 1 | Art | Taxom |
| Leptonetidae Simon, 1890 | | 0 | Arten | Taxom |
| Liacaridae Sellnick, 1928 | | 0 | Arten | Taxom |
| Licnodamaeidae (Grandjean, 1954) | | 8 | Arten | Taxom |
| Liebstadiidae J. & P. Balogh, 1984 | | 20 | Arten | Taxom |
| Limnesiidae Thor, 1900 | | 10 | Arten | Taxom |
| Limnocharidae Grube, 1859 | | 1 | Art | Taxom |
| Linyphiidae Blackwall, 1859 | Baldachinspinnen | 200 | Arten | Taxom |
| Liodidae Grandjean, 1954 | | 1 | Art | Taxom |
| Listrophoridae Mégnin & Tro..., 1884 | | 4 | Arten | Taxom |
| Lycosidae Lehtinen & H..., 1979 | Wolfspinnen | 63 | Arten | Taxom |
| Lyrifissellidae A. D. Paschoal, 1989 | | 2 | Arten | Taxom |
| Machuellidae Balogh, 1983 | | 2 | Arten | Taxom |
| Macrochelidae Vitzthum, 1930 | | 20 | Arten | Taxom |
| Macronyssidae Oudemans, 1936 | | 11 | Arten | Taxom |
| Malaconothridae Berlese, 1916 | | 14 | Arten | Taxom |
| Malkaridae Davies, 1980 | | 11 | Arten | Taxom |
| Maudheimiidae J. & P. Balogh, 1984 | | 1 | Art | Taxom |
| Mecognathidae Gerson & Walter, 1998 | | 3 | Arten | Taxom |
| Mecysmaucheniidae Simon, 1895 | | 3 | Arten | Taxom |
| Melicharidae (Hirschmann, 1962) | | 4 | Arten | Taxom |
| Microdispidae Cross, 1965 | | 1 | Art | Taxom |
| Micropholcommatidae Hickman, 1943 | | 17 | Arten | Taxom |
| Microtrombidiidae Womersley, 1936 | | 11 | Arten | Taxom |
| Microzetidae Grandjean, 1936 | | 2 | Arten | Taxom |
| Mideopsidae Koenike, 1910 | | 46 | Arten | Taxom |
| Migidae Simon, 1892 | | 30 | Arten | Taxom |
| Mimetidae Simon, 1881 | Spinnenfresser | 6 | Arten | Taxom |
| Miturgidae Simon, 1885 | Dornfingerspinnen | 11 | Arten | Taxom |
| Mochlozetidae Grandjean, 1960 | | 1 | Art | Taxom |
| Momoniidae Viets, 1926 | | 8 | Arten | Taxom |
| Monoscutidae (Forster, 1948) | | 16 | Arten | Taxom |
| Mycobatidae Grandjean, 1954 | | 3 | Arten | Taxom |
| Myobiidae Megnin, 1877 | | 5 | Arten | Taxom |
| Myocoptidae Gunther, 1942 | | 1 | Art | Taxom |
| Mysmenidae Petrunkevitch, 1928 | Kleinkugelspinnen | 7 | Arten | Taxom |
| Nanhermanniidae Sellnick, 1928 | | 3 | Arten | Taxom |
| Nanorchestidae Luxton, 1984 | | 2 | Arten | Taxom |
| Nehypochthoniidae Norton & Metz, 1980 | | 1 | Art | Taxom |
| Nenteriidae Hirschmann, 1979 | | 4 | Arten | Taxom |
| Neoliodidae (Sellnick, 1928) | | 2 | Arten | Taxom |
| Neopilionidae Lawrence, 1931 | | 20 | Arten | Taxom |
| Neopygmephoridae Cross, 1965 | | 13 | Arten | Taxom |
| Nesticidae Simon, 1894 | Höhlenspinnen | 5 | Arten | Taxom |
| Nicodamidae Simon, 1898 | | 2 | Arten | Taxom |
| Nodocepheidae Piffl, 1972 | | 1 | Art | Taxom |
| Nosybeidae Mahunka, 1993 | | 3 | Arten | Taxom |
| Nosybelbidae Mahunka, 1994 | | 1 | Art | Taxom |
| Nothridae Berlese, 1896 | | 5 | Arten | Taxom |
| Ochyroceratidae Fage, 1912 | Bodensechsaugenspinnen | 4 | Arten | Taxom |
| Oecobiidae Blackwall, 1862 | Scheibennetzspinnen | 2 | Arten | Taxom |
| Oehserchestidae Kethley, 1977 | | 1 | Art | Taxom |
| Ologamasidae Ryke, 1962 | | 30 | Arten | Taxom |
| Olpiidae Banks, 1895 | | 4 | Arten | Taxom |
| Oonopidae Simon, 1890 | Zwergsechsaugenspinnen | 21 | Arten | Taxom |
| Oppiidae Sellnick, 1937 | | 95 | Arten | Taxom |
| Oribatellidae Jacot, 1925 | | 1 | Art | Taxom |
| Oribatulidae Thor, 1929 | | 10 | Arten | Taxom |
| Oribotritiidae Grandjean, 1954 | | 11 | Arten | Taxom |
| Oripodidae Jacot, 1925 | | 6 | Arten | Taxom |
| Orsolobidae Cooke, 1965 | | 108 | Arten | Taxom |
| Otocepheidae Balogh, 1961 | | 14 | Arten | Taxom |
| Otopheidomenidae Treat, 1955 | | 2 | Arten | Taxom |
| Oxidae Viets, 1926 | | 19 | Arten | Taxom |
| Oxyopidae Thorell, 1870 | Luchsspinnen | 2 | Arten | Taxom |
| Pachylaelapidae Berlese, 1913 | | 1 | Art | Taxom |
| Parakalummidae Grandjean, 1936 | | 2 | Arten | Taxom |
| Parantennulidae Willmann, 1940 | | 1 | Art | Taxom |
| Pararchaeidae Forster & Pl..., 1984 | | 3 | Arten | Taxom |
| Parasitidae Oudemans, 1901 | Käfermilben | 8 | Arten | Taxom |
| Parholaspididae Evans, 1956 | | 2 | Arten | Taxom |
| Penthaleidae Oudemans, 1931 | Sandmilben | 4 | Arten | Taxom |
| Penthalodidae Strandtmann, 1964 | | 6 | Arten | Taxom |
| Periegopidae Simon, 1893 | | 3 | Arten | Taxom |
| Perlohmanniidae Grandjean, 1954 | | 1 | Art | Taxom |
| Pettalidae Simon, 1879 | | 28 | Arten | Taxom |
| Phalangiidae Latreille, 1802 | Schneider | 2 | Arten | Taxom |
| Phenopelopidae Petrunkevitch, 1955 | | 3 | Arten | Taxom |
| Pheroliodidae Paschoal, 1987 | | 3 | Arten | Taxom |
| Philodromidae Thorell, 1870 | Laufspinnen | 14 | Arten | Taxom |
| Pholcidae C. L. Koch, 1851 | Zitterspinnen | 16 | Arten | Taxom |
| Phrynidae Blanchard, 1852 | | 1 | Art | Taxom |
| Phthiracaridae Perty, 1841 | | 46 | Arten | Taxom |
| Phytoptidae Manson, 1970 | | 4 | Arten | Taxom |
| Phytoseiidae Berlese, 1916 | | 43 | Arten | Taxom |
| Pionidae Thor, 1900 | | 3 | Arten | Taxom |
| Pisauridae Simon, 1890 | Jagdspinnen | 16 | Arten | Taxom |
| Plateremaeidae Trägårdh, 1931 | | 3 | Arten | Taxom |
| Podapolipidae Husband, 1990 | | 10 | Arten | Taxom |
| Podocinidae Berlese, 1913 | | 2 | Arten | Taxom |
| Polyaspidae (Berlese, 1913) | | 2 | Arten | Taxom |
| Polyaspididae Berlese, 1913 | | 2 | Arten | Taxom |
| Pontarachnidae Koenike, 1910 | | 0 | Arten | Taxom |
| Proctophyllodidae Trouessart &..., 1884 | | 13 | Arten | Taxom |
| Protoribatidae J. & P. Balogh, 1984 | | 1 | Art | Taxom |
| Pseudoppiidae (Mahunka, 1975) | | 1 | Art | Taxom |
| Psorergatidae Womersley, 1941 | | 4 | Arten | Taxom |
| Psoroptidae Hering, 1838 | Räudemilben | 8 | Arten | Taxom |
| Pterolichidae Trouessart, 1899 | | 5 | Arten | Taxom |
| Pteronyssidae Oudemans, 1941 | | 3 | Arten | Taxom |
| Pterygosomatidae Womersley, 1941 | Geckomilben | 6 | Arten | Taxom |
| Punctoribatidae Thor, 1937 | | 7 | Arten | Taxom |
| Pyemotidae Newport, 1850 | | 2 | Arten | Taxom |
| Pygmephoridae Krczal, 1964 | | 1 | Art | Taxom |
| Pyroglyphidae Cunliffe, 1958 | | 5 | Arten | Taxom |
| Quadroppiidae Balogh, 1983 | | 2 | Arten | Taxom |
| Raphignathidae Kramer, 1877 | | 4 | Arten | Taxom |
| Rhagidiidae Zacharda, 1980 | | 10 | Arten | Taxom |
| Rhinonyssidae Trouessart, 1895 | | 14 | Arten | Taxom |
| Rhodacaridae Oudemans, 1902 | | 4 | Arten | Taxom |
| Ricinoididae Ewing, 1929 | | 1 | Art | Taxom |
| Rosensteiniidae Cooreman, 1954 | | 1 | Art | Taxom |
| Salticidae Blackwall, 1842 | Springspinnen | 168 | Arten | Taxom |
| Samoidae Sørensen, 1886 | | 4 | Arten | Taxom |
| Sarcoptidae Megnin, 1877 | Krätzemilben | 8 | Arten | Taxom |
| Scheloribatidae Jacot, 1935 | | 22 | Arten | Taxom |
| Sclerosomatidae Simon, 1879 | Kammkrallenkanker | 1 | Art | Taxom |
| Scorpionidae Pierre André..., 1802 | | 6 | Arten | Taxom |
| Scutacaridae Paoli, 1911 | | 12 | Arten | Taxom |
| Scutoverticidae Grandjean, 1954 | | 1 | Art | Taxom |
| Scytodidae Blackwall, 1864 | Leimschleuderspinnen | 8 | Arten | Taxom |
| Segestriidae Simon, 1893 | Fischernetzspinnen | 6 | Arten | Taxom |
| Sejidae Berlese, 1885 | | 1 | Art | Taxom |
| Selenopidae Simon, 1897 | | 0 | Arten | Taxom |
| Sicariidae Keyserling, 1880 | Geigenspinnen | 4 | Arten | Taxom |
| Siteroptidae Martin, 1978 | | 17 | Arten | Taxom |
| Smarididae Kramer, 1878 | | 1 | Art | Taxom |
| Sparassidae Bertkau, 1872 | Huschspinnen | 11 | Arten | Taxom |
| Sperchontidae Thor, 1900 | | 1 | Art | Taxom |
| Spinturnicidae Oudemans, 1902 | Flughautmilben | 2 | Arten | Taxom |
| Steganacaridae (Niedbała, 1986) | | 4 | Arten | Taxom |
| Stigmaeidae Wood, 1967 | | 95 | Arten | Taxom |
| Stiphidiidae Dalmas, 1917 | | 57 | Arten | Taxom |
| Strandtmanniidae M. Zacharda, 1979 | | 1 | Art | Taxom |
| Stygotoniidae Cook, 1992 | | 1 | Art | Taxom |
| Suctobelbidae Jacot, 1938 | | 14 | Arten | Taxom |
| Suidasiidae Hughes, 1948 | | 4 | Arten | Taxom |
| Syarinidae Chamberlin, 1930 | | 3 | Arten | Taxom |
| Symphytognathidae Hickman, 1931 | | 3 | Arten | Taxom |
| Synotaxidae Simon, 1894 | | 59 | Arten | Taxom |
| Synthetonychiidae (Forster, 1954) | | 14 | Arten | Taxom |
| Syringobiidae Trouessart, 1897 | | 3 | Arten | Taxom |
| Syringophilidae Lavoipierre, 1953 | | 3 | Arten | Taxom |
| Tanaupodidae Thor, 1935 | | 0 | Arten | Taxom |
| Tarsonemidae Kramer, 1877 | Fadenfußmilben | 21 | Arten | Taxom |
| Tectocepheidae Grandjean, 1954 | | 1 | Art | Taxom |
| Tegoribatidae Grandjean, 1954 | | 3 | Arten | Taxom |
| Tengellidae (Dahl, 1908) | | 3 | Arten | Taxom |
| Tenuipalpidae Berlese, 1913 | Falsche Spinnmilben | 25 | Arten | Taxom |
| Tetrablemmidae O. P-Cambridge, 1873 | | 3 | Arten | Taxom |
| Tetragnathidae Menge, 1866 | Dickkieferspinnen | 103 | Arten | Taxom |
| Tetranychidae Donnadieu, 1875 | Spinnmilben | 58 | Arten | Taxom |
| Thelyphonidae Lucas, 1835 | | 2 | Arten | Taxom |
| Theraphosidae Thorell, 1870 | Vogelspinne | 1 | Art | Taxom |
| Theridiidae Sundevall, 1833 | Kugelspinnen | 145 | Arten | Taxom |
| Theridiosomatidae Simon, 1881 | Zwergkreuzspinnen | 1 | Art | Taxom |
| Thomisidae Sundevall, 1833 | Krabbenspinnen | 56 | Arten | Taxom |
| Thyrisomidae Grandjean, 1953 | | 0 | Arten | Taxom |
| Titanoecidae Lehtinen, 1967 | Kalksteinspinnen | 1 | Art | Taxom |
| Trachytidae Tragärdh, 1938 | | 0 | Arten | Taxom |
| Trachyuropodidae Kramer, 1881 | | 2 | Arten | Taxom |
| Trematuridae Berlese, 1917 | | 1 | Art | Taxom |
| Trhypochthoniidae Willmann, 1931 | | 7 | Arten | Taxom |
| Triaenonychidae Sörensen, 1886 | | 118 | Arten | Taxom |
| Trigonuropodidae Hirschmann, 1979 | | 2 | Arten | Taxom |
| Triophytydeidae | | 0 | Arten | Taxom |
| Triplogyniidae Funk, 1977 | | 1 | Art | Taxom |
| Trombiculidae Ewing, 1929 | Herbstmilben | 17 | Arten | Taxom |
| Trouessartiidae Gaud, 1957 | | 2 | Arten | Taxom |
| Tuckerellidae Baker & Prit..., 1953 | | 4 | Arten | Taxom |
| Tumerozetidae Hammer, 1966 | | 5 | Arten | Taxom |
| Tuparezetidae Balogh, 1972 | | 3 | Arten | Taxom |
| Turbinoptidae Fain, 1957 | | 1 | Art | Taxom |
| Tydeidae Kramer, 1877 | Staubmilben | 7 | Arten | Taxom |
| Uloboridae Thorell, 1869 | Kräuselradnetzspinnen | 9 | Arten | Taxom |
| Unionicolidae Oudemans, 1909 | | 4 | Arten | Taxom |
| Urodinychidae Berlese, 1917 | | 8 | Arten | Taxom |
| Uropodidae Kramer, 1881 | | 8 | Arten | Taxom |
| Vaejovidae Thorell, 1876 | | 2 | Arten | Taxom |
| Varroidae Delfinado & ..., 1974 | | 1 | Art | Taxom |
| Veigaiidae Oudemans, 1939 | | 6 | Arten | Taxom |
| Winterschmidtiidae Oudemans, 1923 | | 2 | Arten | Taxom |
| Withiidae Chamberlin, 1931 | | 3 | Arten | Taxom |
| Xolalgidae Dubinin, 1953 | | 1 | Art | Taxom |
| Zalmoxidae (Sörensen, 1886) | | 2 | Arten | Taxom |
| Zelandothyadidae Smit, 1996 | | 2 | Arten | Taxom |
| Zerconidae Berlese, 1892 | | 1 | Art | Taxom |
| Zetomotrichidae Grandjean, 1934 | | 1 | Art | Taxom |
| Zodariidae Thorell, 1881 | Ameisenjäger | 5 | Arten | Taxom |
| Zoridae F. O. P-Camb..., 1893 | Wanderspinnen | 1 | Art | Taxom |
| Zoropsidae Bertkau, 1882 | Kräuseljagdspinnen | 3 | Arten | Taxom |