| Acanthocnemidae Crowson, 1964 | | 5 | Arten | Taxom |
| Acanthopteroctetidae Davis, 1978 | | 8 | Arten | Taxom |
| Acartophthalmidae Czerny, 1928 | Augenstoppelfliegen | 8 | Arten | Taxom |
| Acroceridae Leach, 1815 | Kugelfliegen | 462 | Arten | Taxom |
| Adelidae Bruand, 1851 | Langfühlermotten | 384 | Arten | Taxom |
| Ademosynidae Ponomarenko, 1968 | | 74 | Arten | Taxom |
| Aderidae Winkler, 1927 | Baummulmkäfer | 923 | Arten | Taxom |
| Agaonidae Walker, 1848 | Feigenwespen | 683 | Arten | Taxom |
| Agapythidae Sen Gupta an..., 1969 | | 1 | Art | Taxom |
| Agathiphagidae N. P. Kriste..., 1967 | | 2 | Arten | Taxom |
| Agonoxenidae (Meyrick, 1926) | | 1 | Art | Taxom |
| Agromyzidae Fallen, 1823 | Minierfliegen | 4580 | Arten | Taxom |
| Agyrtidae Thomson, 1859 | Scheinaaskäfer | 87 | Arten | Taxom |
| Aididae Schaus, 1906 | | 10 | Arten | Taxom |
| Alavarommatidae Ortega-Blanc..., 2011 | | 1 | Art | Taxom |
| Alexiidae Imhoff, 1856 | Kugelkäfer | 5 | Arten | Taxom |
| Alinkidae Krzemi& 324;ski, 1992 | | 1 | Art | Taxom |
| Alleculidae Laporte de C..., 1840 | Pflanzenkäfer | 1 | Art | Taxom |
| Alloioscarabaeidae Bai & al., 2012 | | 1 | Art | Taxom |
| Alucitidae Leach, 1815 | Federgeistchen | 286 | Arten | Taxom |
| Amphizoidae LeConte, 1853 | Forellenbachkäfer | 6 | Arten | Taxom |
| Ampulicidae Shuckard, 1840 | Schaben-Grabwespen | 252 | Arten | Taxom |
| Anaxyelidae Martynov, 1925 | | 45 | Arten | Taxom |
| Ancistropsyllidae Toumanoff & ..., 1947 | | 3 | Arten | Taxom |
| Andesianidae Davis & Gentili, 2003 | | 3 | Arten | Taxom |
| Andrenidae Webster, 1913 | Erdbienen | 3343 | Arten | Taxom |
| Aneuretopsychidae Rasnitsyn & ..., 1990 | | 7 | Arten | Taxom |
| Angarosphecidae Rasnitsyn, 1975 | | 9 | Arten | Taxom |
| Anisopodidae Knab, 1912 | Fenstermücken | 244 | Arten | Taxom |
| Anomalopsychidae Flint, 1981 | | 37 | Arten | Taxom |
| Anomopterellidae (Rasnitsyn, 1975) | | 2 | Arten | Taxom |
| Anomosetidae Tillyard, 1919 | | 1 | Art | Taxom |
| Anormochoristidae Tillyard, 1926 | | 1 | Art | Taxom |
| Ansorgiidae Krzeminski &..., 1993 | | 1 | Art | Taxom |
| Antefungivoridae Rohdendorf, 1938 | | 29 | Arten | Taxom |
| Anthelidae Turner, 1904 | | 203 | Arten | Taxom |
| Anthicidae Latreille, 1819 | Blumenkäfer | 2317 | Arten | Taxom |
| Anthomyiidae Robineau-Des..., 1830 | Blumenfliegen | 2680 | Arten | Taxom |
| Anthomyzidae Czerny, 1903 | Einmieterfliegen | 279 | Arten | Taxom |
| Anthophoridae (C. L. Koch, 1846) | Pelzbienen | 21 | Arten | Taxom |
| Anthribidae Billberg, 1820 | Breitrüßler | 3344 | Arten | Taxom |
| Antipodoeciidae Ross, 1967 | | 1 | Art | Taxom |
| Apataniidae Wallengren, 1886 | | 295 | Arten | Taxom |
| Apatelodidae Neumoegen & ..., 1894 | | 11 | Arten | Taxom |
| Aphelinidae Thomson, 1876 | | 1423 | Arten | Taxom |
| Aphodiidae Leach, 1815 | Dungkäfer | 32 | Arten | Taxom |
| Apidae Latreille, 1802 | Bienen | 7436 | Arten | Taxom |
| Apioceridae Bigot, 1852 | | 154 | Arten | Taxom |
| Apsilocephalidae Nagatomi & al., 1991 | | 7 | Arten | Taxom |
| Aptenoperissidae Rasnitsyn & ..., 2016 | | 1 | Art | Taxom |
| Apteropanorpidae Byers, 1965 | | 4 | Arten | Taxom |
| Archaemiopteridae Guthorl, 1939 | | 1 | Art | Taxom |
| Archaeocynipidae Rasnitsyn & ..., 1988 | | 3 | Arten | Taxom |
| Archaeolepidae (Whalley, 1985) | | 1 | Art | Taxom |
| Archaeolepiidae Whalley, 1985 | | 1 | Art | Taxom |
| Archaeoserphitidae Engel, 2015 | | 1 | Art | Taxom |
| Archeocrypticidae Kaszab, 1964 | | 66 | Arten | Taxom |
| Archilimoniidae Krzeminski &..., 2003 | | 1 | Art | Taxom |
| Archipanorpidae Tillyard, 1917 | | 1 | Art | Taxom |
| Archisargidae Rohdendorf, 1962 | | 42 | Arten | Taxom |
| Archisialidae Martynov, 1933 | | 1 | Art | Taxom |
| Archizelmiridae Rohdendorf, 1962 | | 5 | Arten | Taxom |
| Arctiidae Leach, 1815 | Bären | 894 | Arten | Taxom |
| Argidae Konow, 1890 | Bürstenhornblattwespen | 505 | Arten | Taxom |
| Artematopodidae Lacordaire, 1857 | | 54 | Arten | Taxom |
| Artiidae | | 0 | Arten | Taxom |
| Ascololepidopterigidae Zhang & al., 2013 | | 3 | Arten | Taxom |
| Asilidae Latreille, 1802 | Jagdfliegen | 9562 | Arten | Taxom |
| Asiochaoboridae Hong & Wang, 1990 | | 4 | Arten | Taxom |
| Asiocoleidae Rohdendorf, 1961 | | 4 | Arten | Taxom |
| Aspidytidae Ribera, Beu..., 2002 | | 3 | Arten | Taxom |
| Asteiidae Rondani, 1856 | Feinfliegen | 161 | Arten | Taxom |
| Atelestidae Hennig, 1970 | Zwergtanzfliegen | 25 | Arten | Taxom |
| Athericidae Stuckenberg, 1973 | Ibisfliegen | 125 | Arten | Taxom |
| Atriplectididae Neboiss, 1977 | | 5 | Arten | Taxom |
| Attelabidae Billberg, 1820 | Blattroller | 5020 | Arten | Taxom |
| Aulacidae Shuckard, 1842 | | 253 | Arten | Taxom |
| Aulacigastridae Wollaston, 1864 | Baumsaftfliegen | 57 | Arten | Taxom |
| Australimyzidae Griffiths, 1972 | | 9 | Arten | Taxom |
| Australochoristidae Krzemi?ski, ..., 2015 | | 1 | Art | Taxom |
| Austrocynipidae Riek, 1971 | | 1 | Art | Taxom |
| Austroleptidae Nagatomi, 1982 | | 10 | Arten | Taxom |
| Austroniidae Kozlov, 1975 | | 4 | Arten | Taxom |
| Autostichidae Le Marchand, 1947 | Zwergpalpenmotten | 454 | Arten | Taxom |
| Awesomidae | | 1 | Art | Taxom |
| Axymyiidae Rohdendorf, 1946 | | 18 | Arten | Taxom |
| Bahiaxenidae Bravo, Pohl,..., 2009 | | 1 | Art | Taxom |
| Baissidae Rasnitsyn, 1975 | | 2 | Arten | Taxom |
| Baissodidae Benton, 1993 | | 8 | Arten | Taxom |
| Baissoferidae Sukatsheva, 1968 | | 5 | Arten | Taxom |
| Barbarochthonidae Scott, 1985 | | 1 | Art | Taxom |
| Batrachedridae Heinemann & ..., 1876 | | 186 | Arten | Taxom |
| Bedelliidae (Stainton, 1849) | | 1 | Art | Taxom |
| Belidae Schönherr, 1826 | | 632 | Arten | Taxom |
| Belmontiidae Tillyard, 1919 | | 1 | Art | Taxom |
| Belohinidae Paulian, 1959 | | 1 | Art | Taxom |
| Beraeidae Wallengren, 1891 | | 65 | Arten | Taxom |
| Berendtimiridae Winkler, 1987 | | 1 | Art | Taxom |
| Bethylidae Halliday, 1839 | Plattwespen | 1559 | Arten | Taxom |
| Bethylonymidae Rasnitsyn, 1975 | | 23 | Arten | Taxom |
| Bibionidae Fleming, 1821 | Haarmücken | 1287 | Arten | Taxom |
| Biphyllidae LeConte, 1861 | Buchenpilzkäfer | 106 | Arten | Taxom |
| Bittacidae Handlirsch, 1906 | Mückenhafte | 344 | Arten | Taxom |
| Blasticotomidae Thomson, 1871 | | 6 | Arten | Taxom |
| Blastobasidae (Meyrick, 1894) | | 20 | Arten | Taxom |
| Blattocoleidae Zeuner, 1933 | | 3 | Arten | Taxom |
| Blephariceridae Loew, 1861 | Lidmücken | 356 | Arten | Taxom |
| Boganiidae Sen Gupta an..., 1966 | | 19 | Arten | Taxom |
| Bohartillidae Kinzelbach, 1969 | | 3 | Arten | Taxom |
| Boholdoyidae Kovalev, 1985 | | 3 | Arten | Taxom |
| Bolboceratidae (Mulsant, 1842) | | 5 | Arten | Taxom |
| Boleopsidae Kirejtshuk &..., 2013 | | 1 | Art | Taxom |
| Bolitophilidae Malloch, 1917 | | 8 | Arten | Taxom |
| Bombycidae Latreille, 1802 | Echte Spinner | 538 | Arten | Taxom |
| Bombyliidae Latreille, 1802 | Hummelfliegen | 6138 | Arten | Taxom |
| Boreidae Latreille, 1816 | Winterhafte | 35 | Arten | Taxom |
| Boridae C. G. Thomson, 1859 | Urkäfer | 7 | Arten | Taxom |
| Bostrichidae Latreille, 1802 | Bohrkäfer | 818 | Arten | Taxom |
| Bothrideridae Erichson, 1845 | Blindkäfer | 261 | Arten | Taxom |
| Brachodidae Agenjo, 1966 | | 190 | Arten | Taxom |
| Brachonidae | | 1 | Art | Taxom |
| Brachycentridae Ulmer, 1903 | | 52 | Arten | Taxom |
| Brachyceridae (Billberg, 1820) | | 55 | Arten | Taxom |
| Brachyceritidae Hong, 2002 | | 1 | Art | Taxom |
| Brachycleistogastridae (Kovalev, 1994) | | 4 | Arten | Taxom |
| Brachypsectridae LeConte & Horn, 1883 | | 5 | Arten | Taxom |
| Brachypteridae (Erichson, 1845) | | 114 | Arten | Taxom |
| Brachystomatidae Melander, 1908 | | 72 | Arten | Taxom |
| Braconidae Latreille, 1829 | Brackwespen | 16457 | Arten | Taxom |
| Bradynobaenidae Saussure, 1892 | | 138 | Arten | Taxom |
| Brahmaeidae Swinhoe, 1892 | Brahmaspinner | 54 | Arten | Taxom |
| Brassolidae (Boisduval, 1836) | | 4 | Arten | Taxom |
| Braulidae Egger, 1853 | Bienenläuse | 9 | Arten | Taxom |
| Brentidae Billberg, 1820 | Langkäfer | 3610 | Arten | Taxom |
| Buprestidae Leach, 1815 | Prachtkäfer | 9428 | Arten | Taxom |
| Byrrhidae Latreille, 1804 | Pillenkäfer | 521 | Arten | Taxom |
| Byturidae Jacquelin du..., 1858 | Blütenfresser | 32 | Arten | Taxom |
| Calamoceratidae Ulmer, 1905 | | 257 | Arten | Taxom |
| Callidulidae Moore, 1877 | | 59 | Arten | Taxom |
| Callipharixenidae Pierce, 1918 | | 1 | Art | Taxom |
| Calliphoridae Brauer & Ber..., 1889 | Schmeißfliegen | 2420 | Arten | Taxom |
| Callirhipidae Emden, 1924 | | 127 | Arten | Taxom |
| Calocidae Ross, 1967 | | 25 | Arten | Taxom |
| Camillidae Frey, 1921 | Nagetierfliegen | 46 | Arten | Taxom |
| Canaceidae (Jones, 1906) | | 149 | Arten | Taxom |
| Canacidae Jones, 1906 | Dünenfliegen | 30 | Arten | Taxom |
| Cantharidae Imhoff, 1856 | Franzosen | 3426 | Arten | Taxom |
| Canthyloscelidae Enderlein, 1912 | | 21 | Arten | Taxom |
| Carabaidae | | 1 | Art | Taxom |
| Carabidae Latreille, 1802 | Laufkäfer | 47579 | Arten | Taxom |
| Caridae Thompson, 1992 | | 44 | Arten | Taxom |
| Carnidae Newman, 1834 | Gefiederfliegen | 115 | Arten | Taxom |
| Carposinidae Walsingham, 1907 | Fruchtwickler | 343 | Arten | Taxom |
| Carthaeidae Common, 1966 | | 1 | Art | Taxom |
| Castniidae Boisduval, 1828 | | 197 | Arten | Taxom |
| Cavognathidae Sen Gupta an..., 1966 | | 10 | Arten | Taxom |
| Cecidomyiidae Newman, 1834 | Gallmücken | 7828 | Arten | Taxom |
| Cecidosidae Brèthes, 1916 | | 22 | Arten | Taxom |
| Celyphidae Bigot, 1852 | | 115 | Arten | Taxom |
| Cephidae Newman, 1834 | Halmwespen | 113 | Arten | Taxom |
| Cerambycidae Latreille, 1802 | Böcke | 41267 | Arten | Taxom |
| Ceraphronidae Haliday, 1833 | | 253 | Arten | Taxom |
| Ceratophyllidae Dampf, 1908 | | 574 | Arten | Taxom |
| Ceratopogonidae Newman, 1834 | Gnitzen | 6879 | Arten | Taxom |
| Cerophytidae Latreille, 1834 | Dornhalskäfer | 31 | Arten | Taxom |
| Cerylonidae Billberg, 1820 | Glattrindenkäfer | 512 | Arten | Taxom |
| Cetoniidae (Leach, 1815) | Rosenkäfer | 6 | Arten | Taxom |
| Chalcididae Latreille, 1817 | Erzwespen | 1796 | Arten | Taxom |
| Chalcodryidae Watt, 1974 | | 15 | Arten | Taxom |
| Chamaemyiidae Hendel, 1910 | Blattlausfliegen | 399 | Arten | Taxom |
| Chaoboridae Newman, 1834 | Büschelmücken | 266 | Arten | Taxom |
| Charipidae | | 0 | Arten | Taxom |
| Chathamiidae Tillyard, 1925 | | 6 | Arten | Taxom |
| Chelonariidae Blanchard, 1845 | | 216 | Arten | Taxom |
| Chimabachidae (HEINEMANN, 1870) | Laubholzmotten | 3 | Arten | Taxom |
| Chimaeropsyllidae Ewing & Fox, 1943 | | 29 | Arten | Taxom |
| Chimeromyiidae Grimaldi & C..., 2009 | | 9 | Arten | Taxom |
| Chironomidae Erichson, 1842 | Schwarmmücken | 11096 | Arten | Taxom |
| Chloropidae Schoenherr, 1840 | Halmfliegen | 3479 | Arten | Taxom |
| Choreutidae Stainton, 1854 | Rundstirnmotten | 376 | Arten | Taxom |
| Choristidae Esben-Petersen, 1915 | | 10 | Arten | Taxom |
| Choristopsychidae Martynov, 1937 | | 4 | Arten | Taxom |
| Chrysididae Latreille, 1802 | Goldwespen | 1682 | Arten | Taxom |
| Chrysomelidae Latreille, 1802 | Blattkäfer | 20946 | Arten | Taxom |
| Chyromyidae Hendel, 1916 | Gelbfliegen | 149 | Arten | Taxom |
| Ciidae Leach, 1819 | Baumschwammfresser | 749 | Arten | Taxom |
| Cimbicidae Kirby, 1837 | Keulenhornblattwespen | 161 | Arten | Taxom |
| Cimbrophlebiidae Willmann, 1977 | | 15 | Arten | Taxom |
| Cladochoristidae Tillyard, 1926 | | 5 | Arten | Taxom |
| Clambidae Fischer, 1821 | Punktkäfer | 183 | Arten | Taxom |
| Cleridae Latreille, 1802 | Buntkäfer | 1430 | Arten | Taxom |
| Clusiidae Schönherr, 1840 | Druidenfliegen | 484 | Arten | Taxom |
| Cneoglossidae Champion, 1897 | | 9 | Arten | Taxom |
| Coccinellidae Latreille, 1807 | Glückskäfer | 3631 | Arten | Taxom |
| Cochylidae | | 6 | Arten | Taxom |
| Coelocatiniidae Ponomarenko, 1968 | | 9 | Arten | Taxom |
| Coelopidae Hendel, 1910 | Tangfliegen | 43 | Arten | Taxom |
| Coenomyiidae (Westwood, 1840) | Stinkfliegen | 1 | Art | Taxom |
| Coleocatiniidae Ponomarenko ..., 2015 | | 1 | Art | Taxom |
| Coleophoridae Hübner, 1825 | Futteralmotten | 2915 | Arten | Taxom |
| Coleopsidae Kirejtshuk &..., 2016 | | 1 | Art | Taxom |
| Colletidae Lepeletier, 1841 | Kropfbienen | 3035 | Arten | Taxom |
| Colymbotethidae Ponomarenko, 1993 | | 2 | Arten | Taxom |
| Conoesucidae Ross, 1967 | | 38 | Arten | Taxom |
| Conopidae Latreille, 1802 | Blasenkopffliegen | 993 | Arten | Taxom |
| Coprinisphaeridae Genise, 2004 | | 1 | Art | Taxom |
| Copromorphidae Meyrick, 1905 | | 62 | Arten | Taxom |
| Coptoclavidae Ponomarenko, 1961 | Ausgestorbene Familie | 56 | Arten | Taxom |
| Coptopsyllidae Wagner, 1928 | | 19 | Arten | Taxom |
| Corethrellidae (Wood & Borkent, 1986) | | 1 | Art | Taxom |
| Corioxenidae Kinzelbach, 1970 | | 60 | Arten | Taxom |
| Corylophidae LeConte, 1852 | Faulholzkäfer | 321 | Arten | Taxom |
| Cosmopterigidae Heinemann & ..., 1876 | Prachtfalter | 2346 | Arten | Taxom |
| Cosmopterygidae (Heinemann & ..., 1876) | | 0 | Arten | Taxom |
| Cossidae Leach, 1815 | Bohrer | 2187 | Arten | Taxom |
| Crabronidae Latreille, 1802 | Grabwespen | 9483 | Arten | Taxom |
| Crambidae Latreille, 1810 | Graszünsler | 13534 | Arten | Taxom |
| Cretohisteridae | | 1 | Art | Taxom |
| Cretostylopidae Grimalid & K..., 2005 | | 1 | Art | Taxom |
| Crosaphididae Kovalev, 1983 | | 2 | Arten | Taxom |
| Crowsoniellidae Iablokoff-Kh..., 1983 | | 1 | Art | Taxom |
| Cryptochetidae Brues & Mela..., 1932 | | 36 | Arten | Taxom |
| Cryptophagidae Kirby, 1937 | Schimmelkäfer | 695 | Arten | Taxom |
| Ctenophthalmidae Rothschild, 1915 | | 540 | Arten | Taxom |
| Ctenostylidae Bigot, 1882 | | 1 | Art | Taxom |
| Ctenuchidae (W. Kirby, 1837) | Widderbären | 37 | Arten | Taxom |
| Cucujidae Latreille, 1802 | Plattkäfer | 746 | Arten | Taxom |
| Culicidae Meigen, 1818 | Stechmücken | 4542 | Arten | Taxom |
| Cupedidae Laporte, 1836 | | 226 | Arten | Taxom |
| Curculionidae Latreille, 1802 | Rüsselkäfer | 63890 | Arten | Taxom |
| Curtonotidae Duda, 1934 | | 78 | Arten | Taxom |
| Cuterebridae (Blake, 1938) | | 1 | Art | Taxom |
| Cybocelphalidae | | 1 | Art | Taxom |
| Cycloristidae Martynova, 1958 | | 2 | Arten | Taxom |
| Cyclotornidae Meyrick, 1912 | | 5 | Arten | Taxom |
| Cylindrotomidae (Mulsant, 1842) | Moosmücken | 32 | Arten | Taxom |
| Cynipidae Latreille, 1802 | Echte Gallwespen | 1610 | Arten | Taxom |
| Cypselosomatidae Hennig, 1958 | | 25 | Arten | Taxom |
| Cypselostomatidae | | 1 | Art | Taxom |
| Dalceridae Dyar, 1898 | | 40 | Arten | Taxom |
| Danaidae (Boisduval, 1833) | | 54 | Arten | Taxom |
| Daohugoidae Rasnitsyn & ..., 2004 | | 1 | Art | Taxom |
| Dascillidae Guérin-Ménev..., 1843 | Moorweichkäfer | 94 | Arten | Taxom |
| Decliniidae Nikitsky, La..., 1994 | | 2 | Arten | Taxom |
| Delopteridae Sellards, 1909 | | 1 | Art | Taxom |
| Depressariidae Meyrick, 1883 | Flachleibmotten | 5 | Arten | Taxom |
| Dermestidae Hope, 1840 | Pelzkäfer | 1506 | Arten | Taxom |
| Derodontidae LeConte, 1861 | Knopfkäfer | 45 | Arten | Taxom |
| Deuterophlebiidae Edwards, 1922 | Bergmücken | 14 | Arten | Taxom |
| Diadocidiidae Winnertz, 1863 | Schleimröhrenmücken | 6 | Arten | Taxom |
| Diapriidae Latreille, 1796 | | 1492 | Arten | Taxom |
| Diastatidae Hendel, 1917 | Laubstreufliegen | 62 | Arten | Taxom |
| Dictyodipteridae Rohdendorf, 1961 | | 1 | Art | Taxom |
| Dinopanorpidae Carpenter, 1972 | | 8 | Arten | Taxom |
| Diopsidae Billberg, 1820 | Stielaugenfliegen | 161 | Arten | Taxom |
| Dioptidae (J. Bechyné, 1950) | | 2 | Arten | Taxom |
| Diphyllostomatidae Holloway, 1972 | | 4 | Arten | Taxom |
| Diprionidae Rohwer, 1911 | Buschhornblattwespen | 101 | Arten | Taxom |
| Dipseudopsidae Ulmer, 1904 | | 124 | Arten | Taxom |
| Discolomatidae Horn, 1878 | | 417 | Arten | Taxom |
| Ditomyiidae Keilin, 1919 | | 77 | Arten | Taxom |
| Dixidae Schiner, 1868 | Doppeladermücken | 287 | Arten | Taxom |
| Dolichopodidae Latreille, 1809 | Langbeinfliegen | 8974 | Arten | Taxom |
| Douglasiidae Heinemann & ..., 1876 | Wippflügelfalter | 47 | Arten | Taxom |
| Drepanidae Meyrick, 1895 | Eulenspinner | 724 | Arten | Taxom |
| Drilidae (Blanchard, 1845) | Schneckenhauskäfer | 3 | Arten | Taxom |
| Drosophilidae Rondani, 1856 | Essigfliegen | 4635 | Arten | Taxom |
| Dryinidae Haliday, 1840 | Zikadenwespen | 1147 | Arten | Taxom |
| Dryomyzidae Schiner, 1862 | Baumfliegen | 59 | Arten | Taxom |
| Dryophthoridae (Schönherr, 1825) | | 17 | Arten | Taxom |
| Dryopidae Billberg, 1820 | Hakenkäfer | 223 | Arten | Taxom |
| Dudgeoneidae Berger, 1958 | | 8 | Arten | Taxom |
| Dynastidae (MacLeay, 1819) | Riesenkäfer | 2 | Arten | Taxom |
| Dysoneuridae Sukatsheva, 1968 | | 6 | Arten | Taxom |
| Dytiscidae Leach, 1815 | Echte Schwimmkäfer | 5827 | Arten | Taxom |
| Ecnomidae Ulmer, 1903 | | 528 | Arten | Taxom |
| Elachistidae Bruand, 1851 | Grasminierfalter | 3257 | Arten | Taxom |
| Elateridae Leach, 1815 | Larven: Echte Drahtwürmer | 12661 | Arten | Taxom |
| Electralbertidae Botosaneanu ..., 1983 | | 1 | Art | Taxom |
| Electrotomidae Rasnitsyn, 1977 | | 1 | Art | Taxom |
| Elenchidae Perkins, 1905 | | 43 | Arten | Taxom |
| Elliidae Krzeminska, ..., 1993 | | 4 | Arten | Taxom |
| Elmidae Curtis, 1830 | Hakenkäfer | 1944 | Arten | Taxom |
| Elodophthalmidae Kirejtshuk &..., 2008 | | 2 | Arten | Taxom |
| Embolemidae Förster, 1856 | Widderkopfwespen | 35 | Arten | Taxom |
| Empididae Latreille, 1809 | Tanzfliegen | 3851 | Arten | Taxom |
| Encyrtidae Walker, 1837 | | 4454 | Arten | Taxom |
| Endomychidae Leach, 1815 | Stäublingskäfer | 1546 | Arten | Taxom |
| Endromidae Boisduval, 1828 | Birkenspinner | 1 | Art | Taxom |
| Englathaumatidae Novokshonov ..., 2016 | | 2 | Arten | Taxom |
| Eoditomyiidae Ansorge, 1996 | | 1 | Art | Taxom |
| Eoichneumonidae (Jell & Duncan, 1986) | | 16 | Arten | Taxom |
| Eolepidopterigidae Rasnitsyn, 1983 | | 14 | Arten | Taxom |
| Eomeropidae Cockerell, 1909 | | 13 | Arten | Taxom |
| Eomyiidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Eophlebomyiidae Cockerell, 1925 | | 1 | Art | Taxom |
| Eopolyneuridae Rohdendorf, 1962 | | 2 | Arten | Taxom |
| Eorpidae Archibald & al., 2013 | | 3 | Arten | Taxom |
| Eostephanitidae Hong, 2002 | | 1 | Art | Taxom |
| Eostratiomyiidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Epermeniidae Spuler, 1910 | Zahnflügelfalter | 434 | Arten | Taxom |
| Ephialtitidae Handlirsch, 1906 | | 80 | Arten | Taxom |
| Ephydridae Zetterstedt, 1837 | Salzfliegen | 2483 | Arten | Taxom |
| Epicopeiidae Swinhoe, 1892 | | 9 | Arten | Taxom |
| Epipyropidae Dyar, 1903 | | 30 | Arten | Taxom |
| Erebidae Leach, 1815 | | 25585 | Arten | Taxom |
| Eremazidae Iablokoff-Kh..., 1977 | | 3 | Arten | Taxom |
| Eremochaetidae Ussatchov, 1968 | | 23 | Arten | Taxom |
| Eriocottidae Spuler, 1898 | | 100 | Arten | Taxom |
| Eriocraniidae Rebel, 1901 | Trugfalter | 51 | Arten | Taxom |
| Erotylidae Latreille, 1802 | Faulholzkäfer | 599 | Arten | Taxom |
| Ethmiidae (Busck, 1909) | | 1 | Art | Taxom |
| Eucharitidae Latreille, 1809 | | 427 | Arten | Taxom |
| Eucinetidae Lacordaire, 1857 | Purzelkäfer | 68 | Arten | Taxom |
| Eucnemidae Eschscholtz, 1829 | Kammkäfer | 417 | Arten | Taxom |
| Eucoilidae (Thomson, 1862) | | 24 | Arten | Taxom |
| Eulichadidae Crowson, 1973 | | 36 | Arten | Taxom |
| Eulophidae Westwood, 1829 | Erzwespen | 5762 | Arten | Taxom |
| Eumenidae (Leach, 1815) | Lehmwespen | 2 | Arten | Taxom |
| Eupelmidae Walker, 1833 | | 1035 | Arten | Taxom |
| Eupterotidae Swinhoe, 1892 | | 556 | Arten | Taxom |
| Eurytomidae Walker, 1832 | | 1611 | Arten | Taxom |
| Euteliidae Grote, 1882 | | 608 | Arten | Taxom |
| Evaniidae Latreille, 1802 | Hungerwespen | 520 | Arten | Taxom |
| Evocoidae Yeates, Irwi..., 2006 | Ocoafliegen | 1 | Art | Taxom |
| Expansicornidae Hong, 2002 | | 1 | Art | Taxom |
| Falsiformicidae Rasnitsyn, 1975 | | 2 | Arten | Taxom |
| Fanniidae Schnabl & Dz..., 1911 | | 434 | Arten | Taxom |
| Fergusoninidae Hennig, 1958 | | 42 | Arten | Taxom |
| Figitidae Thomson, 1862 | | 1208 | Arten | Taxom |
| Formicidae Latreille, 1809 | Ameisen | 19027 | Arten | Taxom |
| Fungivoritidae Rohdendorf, 1957 | | 13 | Arten | Taxom |
| Galacticidae Minet, 1986 | | 27 | Arten | Taxom |
| Gasteruptiidae Ashmead, 1900 | Gichtwespen | 306 | Arten | Taxom |
| Gelechiidae Stainton, 1854 | Palpenfalter | 6732 | Arten | Taxom |
| Geometridae Leach, 1815 | Spanner | 24844 | Arten | Taxom |
| Georyssidae Laporte, 1819 | | 3 | Arten | Taxom |
| Geotrupidae Latreille, 1802 | Blatthornkäfer | 1403 | Arten | Taxom |
| Gerocynipidae Kovalev, 1994 | | 5 | Arten | Taxom |
| Gigasiricidae (Rasnitsyn, 1968) | | 1 | Art | Taxom |
| Glaphyridae MacLeay, 1819 | | 241 | Arten | Taxom |
| Glaphyropteridae Pongracz, 1935 | | 24 | Arten | Taxom |
| Glaresidae Kolbe, 1905 | | 98 | Arten | Taxom |
| Glossinidae Theobald, 1903 | Tsetsefliegen | 32 | Arten | Taxom |
| Glossopteridae Sharov, 1966 | | 1 | Art | Taxom |
| Glossosomatidae Wallengren, 1891 | | 747 | Arten | Taxom |
| Glyphipterigidae Stainton, 1854 | Halbmotten | 490 | Arten | Taxom |
| Gnomuscidae Shcherbakov, 1995 | | 2 | Arten | Taxom |
| Gobryidae Mcalpine, 1997 | | 6 | Arten | Taxom |
| Goeridae Ulmer, 1903 | | 206 | Arten | Taxom |
| Gracillariidae Stainton, 1854 | Blatttütenfalter | 2516 | Arten | Taxom |
| Grauvogeliidae Krzeminski, 1994 | | 6 | Arten | Taxom |
| Gyrinidae Latreille, 1802 | Drehkäfer | 634 | Arten | Taxom |
| Halictidae Thomson, 1869 | Schmalbienen und Furchenbienen | 6482 | Arten | Taxom |
| Halictophagidae Perkins, 1905 | | 176 | Arten | Taxom |
| Haliplidae Aubé, 1836 | Wassertreter | 298 | Arten | Taxom |
| Hedylidae Guenée, 1857 | | 32 | Arten | Taxom |
| Helcomyzidae Malloch, 1933 | Strandfliegen | 9 | Arten | Taxom |
| Heleomyzidae (Westwood, 1840) | Dunkelfliegen | 848 | Arten | Taxom |
| Heliconiidae (Swainson, 1822) | | 9 | Arten | Taxom |
| Helicophidae Mosely, 1953 | | 16 | Arten | Taxom |
| Helicopsychidae Ulmer, 1912 | | 316 | Arten | Taxom |
| Heliodinidae Heinemann & ..., 1876 | Sonnenmotten | 86 | Arten | Taxom |
| Heliozelidae Heinemann & ..., 1876 | Erzglanzfalter | 146 | Arten | Taxom |
| Helophoridae (Leach, 1815) | | 1 | Art | Taxom |
| Heloridae Förster, 1856 | Florfliegenwespen | 27 | Arten | Taxom |
| Helosciomyzidae Griffiths, 1972 | | 40 | Arten | Taxom |
| Helotidae Reitter, 1876 | | 123 | Arten | Taxom |
| Hennigmatidae Shcherbakov, 1995 | | 4 | Arten | Taxom |
| Hepialidae Stephens, 1829 | Wurzelbohrer | 844 | Arten | Taxom |
| Hesperiidae Latreille, 1809 | Dickkopfalter | 7421 | Arten | Taxom |
| Hesperinidae Hendel, 1928 | | 11 | Arten | Taxom |
| Heterobathmiidae Kristensen &..., 1979 | | 3 | Arten | Taxom |
| Heteroceridae MacLeay, 1825 | Sägekäfer | 423 | Arten | Taxom |
| Heterocheilidae Mcalpine, 1991 | Halbbrückenfliegen | 11 | Arten | Taxom |
| Heterogynidae Rambur, 1866 | Federwidderchen | 10 | Arten | Taxom |
| Heteromyzidae Fallen, 1820 | Scheufliegen | 79 | Arten | Taxom |
| Hilarimorphidae Hendel, 1936 | Auenfliegen | 37 | Arten | Taxom |
| Himantopteridae Rogenhofer, 1884 | | 105 | Arten | Taxom |
| Hippoboscidae Samouelle, 1819 | Lausfliegen | 759 | Arten | Taxom |
| Histeridae Gyllenhal, 1808 | Stutzkäfer | 6368 | Arten | Taxom |
| Hoffeinsmyiidae Michelsen, 2009 | | 1 | Art | Taxom |
| Holcopogonidae Gozmany, 1967 | | 2 | Arten | Taxom |
| Holcorpidae Willmann, 1989 | | 2 | Arten | Taxom |
| Homalophlebiidae Handlirsch, 1906 | | 3 | Arten | Taxom |
| Huaxiasciaritidae (Hong, 2002) | | 28 | Arten | Taxom |
| Huttoninidae (Steyskal, 1965) | | 8 | Arten | Taxom |
| Hyblaeidae Hampson, 1903 | | 33 | Arten | Taxom |
| Hybosoridae Erichson, 1847 | | 810 | Arten | Taxom |
| Hybotidae Meigen, 1820 | Buckeltanzfliegen | 2350 | Arten | Taxom |
| Hydraenidae Mulsant, 1844 | Langtaster-Wasserkäfer | 2301 | Arten | Taxom |
| Hydrobiosidae Ulmer, 1905 | | 1045 | Arten | Taxom |
| Hydrochidae (Thomson, 1859) | Rippenwasserkäfer | 1 | Art | Taxom |
| Hydrophilidae Latreille, 1802 | Kolbenwasserkäfer | 4640 | Arten | Taxom |
| Hydropsychidae Curtis, 1835 | | 1874 | Arten | Taxom |
| Hydroptilidae Stephens, 1836 | | 3708 | Arten | Taxom |
| Hydrosalpingidae Scott, 1985 | | 1 | Art | Taxom |
| Hydroscaphidae LeConte, 1874 | | 29 | Arten | Taxom |
| Hygrobiidae Régimbart, 1878 | Feuchtkäfer | 8 | Arten | Taxom |
| Hyperpolyneuridae Rohdendorf, 1961 | | 1 | Art | Taxom |
| Hystrichopsyllidae Tiraboschi, 1904 | | 138 | Arten | Taxom |
| Ibaliidae Thomson, 1862 | Dornwurmwespen | 31 | Arten | Taxom |
| Ichneumonidae Latreille, 1802 | Echte Schlupfwespen | 19260 | Arten | Taxom |
| Ichneumonomimidae Rasnitsyn, 1975 | | 2 | Arten | Taxom |
| Ideliidae (Zalessky, 1929) | | 45 | Arten | Taxom |
| Immidae Heppner, 1977 | | 164 | Arten | Taxom |
| Inbiomyiidae Buck, 2006 | | 11 | Arten | Taxom |
| Incurvariidae Spuler, 1898 | Echte Blattsackfalter | 80 | Arten | Taxom |
| Ironomyiidae McAlpine & M..., 1966 | | 26 | Arten | Taxom |
| Ischnopsyllidae Wahlgren, 1907 | Fledermausflöhe | 132 | Arten | Taxom |
| Ithyceridae (Schönherr, 1826) | | 6 | Arten | Taxom |
| Jacobsoniidae Heller, 1926 | | 29 | Arten | Taxom |
| Jurapriidae Rasnitsyn, 1983 | | 2 | Arten | Taxom |
| Jurodidae Ponomarenko, 1985 | | 6 | Arten | Taxom |
| Kalophryganeidae Haupt, 1956 | | 1 | Art | Taxom |
| Kaltanidae Martynova, 1958 | | 39 | Arten | Taxom |
| Karatavitidae Rasnitsyn, 1963 | | 21 | Arten | Taxom |
| Kateretidae Kirkby, 1837 | Riedgras-Glanzkäfer | 30 | Arten | Taxom |
| Keroplatidae Rondani, 1856 | Langhornmücken | 1280 | Arten | Taxom |
| Khutelchalcididae Rasnitsyn & al., 2004 | | 2 | Arten | Taxom |
| Kinzelbachillidae Pohl & Beutel, 2016 | | 1 | Art | Taxom |
| Kokiriidae McFarlane, 1964 | | 10 | Arten | Taxom |
| Kovalevisargidae Mostovski, 1997 | | 6 | Arten | Taxom |
| Kuafuidae Rasnitsyn & ..., 2010 | | 1 | Art | Taxom |
| Labradorocoleidae Ponomarenko, 1969 | | 1 | Art | Taxom |
| Lacturidae Heppner, 1995 | | 52 | Arten | Taxom |
| Laemophloeidae (Ganglbauer, 1899) | Bastplattkäfer | 46 | Arten | Taxom |
| Lagriidae (Latreille, 1825) | Wollkäfer | 1 | Art | Taxom |
| Lamingtoniidae Gupta & Crowson, 1969 | | 3 | Arten | Taxom |
| Lampyridae Latreille, 1817 | Glühwürmchen | 3262 | Arten | Taxom |
| Languriidae (Latreille, 1802) | Getreidekäfer | 1 | Art | Taxom |
| Lasiocampidae Harris, 1841 | Glucken | 2176 | Arten | Taxom |
| Lasiosynidae Kirejtshuk, ..., 2010 | | 52 | Arten | Taxom |
| Latridiidae Erichson, 1842 | Moderkäfer | 751 | Arten | Taxom |
| Lauxaniidae Macquart, 1835 | Faulfliegen | 2196 | Arten | Taxom |
| Lecithoceridae Le Marchand, 1947 | | 1067 | Arten | Taxom |
| Leiodidae Fleming, 1821 | Schwammkugelkäfer | 4802 | Arten | Taxom |
| Lemoniidae Hampson, 1918 | Herbstspinner | 25 | Arten | Taxom |
| Lepiceridae Hinton, 1936 | | 7 | Arten | Taxom |
| Lepidostomatidae Ulmer, 1903 | | 822 | Arten | Taxom |
| Leptidae | | 0 | Arten | Taxom |
| Leptoceridae Leach, 1815 | | 2588 | Arten | Taxom |
| Leptopsyllidae Rothschild &..., 1915 | | 218 | Arten | Taxom |
| Leucospidae Fabricius, 1775 | Falten-Erzwespen | 161 | Arten | Taxom |
| Liadytidae Ponomarenko, 1977 | | 8 | Arten | Taxom |
| Liassophilidae Tillyard, 1933 | | 6 | Arten | Taxom |
| Limacodidae Duponchel, 1845 | Asselspinner | 1387 | Arten | Taxom |
| Limnephilidae Kolenati, 1848 | | 1381 | Arten | Taxom |
| Limnetidae Hong, 1983 | | 1 | Art | Taxom |
| Limnichidae Erichson, 1846 | Uferpillenkäfer | 393 | Arten | Taxom |
| Limnocentropodidae Tsuda, 1942 | | 17 | Arten | Taxom |
| Limoniidae (Speiser, 1909) | Stelzmücken | 1975 | Arten | Taxom |
| Liopteridae Ashmead, 1895 | | 95 | Arten | Taxom |
| Lithopanorpidae Carpenter, 1930 | | 2 | Arten | Taxom |
| Lithoscarabaeidae Nikolajev, 1992 | | 3 | Arten | Taxom |
| Lonchaeidae Loew, 1861 | Lanzenfliegen | 615 | Arten | Taxom |
| Lonchopteridae Curtis, 1839 | Lanzenfliegen | 74 | Arten | Taxom |
| Lophocoronidae Common, 1973 | | 7 | Arten | Taxom |
| Luanpingitidae Zhang, 1986 | | 1 | Art | Taxom |
| Lucanidae Latreille, 1804 | Hirschkäfer | 2906 | Arten | Taxom |
| Lutrochidae Kasap & Crowson, 1975 | | 14 | Arten | Taxom |
| Lycaenidae Leach, 1815 | Bläulinge | 10821 | Arten | Taxom |
| Lycanidae (Leach, 1815) | Bläulinge | 1 | Art | Taxom |
| Lycidae Laporte, 1836 | Rotdeckenkäfer | 1461 | Arten | Taxom |
| Lygistorrhinidae Hendel, 1936 | | 24 | Arten | Taxom |
| Lymexylidae Fleming, 1821 | Werftkäfer | 88 | Arten | Taxom |
| Lyonetiidae Stainton, 1854 | Langhorn-Blattminierfalter | 557 | Arten | Taxom |
| Lypusidae Herrich-Schä..., 1857 | | 10 | Arten | Taxom |
| Maamingidae Early, Manse..., 2001 | | 2 | Arten | Taxom |
| Macropsyllidae Oudemans, 1909 | | 3 | Arten | Taxom |
| Magnocoleidae Hong, 1998 | | 1 | Art | Taxom |
| Maimetshidae (Rasnitsyn, 1975) | | 20 | Arten | Taxom |
| Malacopsyllidae Baker, 1905 | | 2 | Arten | Taxom |
| Marginidae Mcalpine, 1991 | | 3 | Arten | Taxom |
| Mauroniscidae Majer, 1995 | | 27 | Arten | Taxom |
| Megachilidae Schenk, 1860 | Bauchsammlerbienen | 5468 | Arten | Taxom |
| Megalodontesidae Konow, 1897 | | 49 | Arten | Taxom |
| Megalopodidae Latreille, 1802 | | 671 | Arten | Taxom |
| Megalopygidae Herrich-Schä..., 1855 | | 108 | Arten | Taxom |
| Megalyridae Schletterer, 1889 | | 102 | Arten | Taxom |
| Megamerinidae Hendel, 1913 | Borkenfliegen | 18 | Arten | Taxom |
| Megaspilidae Ashmead, 1893 | | 304 | Arten | Taxom |
| Melandryidae Leach, 1815 | Düsterkäfer | 496 | Arten | Taxom |
| Melittidae Schenk, 1860 | Sägehornbienen | 280 | Arten | Taxom |
| Melittosphecidae Poinar & Dan..., 2006 | | 1 | Art | Taxom |
| Meloidae Gyllenhal, 1810 | Blasenkäfer | 2805 | Arten | Taxom |
| Melolonthidae (Leach, 1817) | Maikäfer | 112 | Arten | Taxom |
| Melyridae Leach, 1815 | Wollhaarkäfer | 1729 | Arten | Taxom |
| Mendozachoristidae Brauckmann &..., 2010 | | 1 | Art | Taxom |
| Mengeidae Pierce, 1908 | | 2 | Arten | Taxom |
| Mengenillidae Kinzelbach, 1970 | | 26 | Arten | Taxom |
| Meropeidae Espen-Petersen, 1921 | | 6 | Arten | Taxom |
| Meruidae Spangler & S..., 2005 | | 1 | Art | Taxom |
| Mesocinetidae Kirejtshuk &..., 2010 | | 4 | Arten | Taxom |
| Mesokristenseniidae Huang, Nel &..., 2010 | | 8 | Arten | Taxom |
| Mesophantasmatidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Mesopsychidae Tillyard, 1917 | | 87 | Arten | Taxom |
| Mesosciophilidae Rohdendorf, 1946 | | 21 | Arten | Taxom |
| Mesoserphidae Kozlov, 1970 | | 34 | Arten | Taxom |
| Metarbelidae (Strand, 1909) | | 36 | Arten | Taxom |
| Methochidae | | 1 | Art | Taxom |
| Metropatoridae Handlirsch, 1906 | | 2 | Arten | Taxom |
| Micromalthidae Barber, 1913 | | 6 | Arten | Taxom |
| Micronoctuidae Fibiger, 2005 | | 114 | Arten | Taxom |
| Micropezidae Illiger, 1798 | Stelzenfliegen | 665 | Arten | Taxom |
| Microphoridae (Chvala, 1983) | Kleine Tanzfliegen | 1 | Art | Taxom |
| Micropterigidae Herrich-Schä..., 1855 | Urmotten | 191 | Arten | Taxom |
| Milichiidae Schiner, 1862 | Nistfliegen | 405 | Arten | Taxom |
| Millieriidae (Stainton, 1854) | | 2 | Arten | Taxom |
| Mimallonidae Burmeister, 1878 | | 201 | Arten | Taxom |
| Mirinidae (Kozlov, 1985) | | 2 | Arten | Taxom |
| Mirolydidae Wang, Rasnit..., 2017 | | 1 | Art | Taxom |
| Mnesarchaeidae Eyer, 1924 | | 19 | Arten | Taxom |
| Molannidae Wallengren, 1891 | | 25 | Arten | Taxom |
| Momphidae Herrich Scha..., 1857 | Fransenmotten | 2 | Arten | Taxom |
| Monomachidae Ashmead, 1902 | | 28 | Arten | Taxom |
| Monotomidae Laporte, 1840 | Detrituskäfer | 298 | Arten | Taxom |
| Mordellidae Latreille, 1802 | Stachelkäfer | 2346 | Arten | Taxom |
| Mormotomyiidae Austen, 1936 | | 2 | Arten | Taxom |
| Muchoriidae Willmann, 1989 | | 1 | Art | Taxom |
| Muscidae Latreille, 1802 | Echte Fliegen | 6681 | Arten | Taxom |
| Musidoromimidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Mutillidae André, 1907 | Ameisenwespen | 2130 | Arten | Taxom |
| Mycetobiidae Winnertz, 1863 | | 1 | Art | Taxom |
| Mycetophagidae Leach, 1815 | Baumschwammkäfer | 156 | Arten | Taxom |
| Mycetophilidae Newman, 1834 | Pilzmücken | 9821 | Arten | Taxom |
| Mycteridae Blanchard, 1845 | Haarscheinrüssler | 163 | Arten | Taxom |
| Mydaidae (Osten Sacken, 1874) | | 2 | Arten | Taxom |
| Mydidae Bezzi, 1903 | Mydasfliegen | 549 | Arten | Taxom |
| Mymaridae Haliday, 1833 | Eierschlupfwespen | 1639 | Arten | Taxom |
| Mymarommatidae Debauche, 1948 | | 101 | Arten | Taxom |
| Myraboliidae Lawrence and..., 1991 | | 7 | Arten | Taxom |
| Myrmecolacidae Saunders, 1872 | | 149 | Arten | Taxom |
| Myrmosidae Fox, 1894 | Trugameisen | 12 | Arten | Taxom |
| Mythicomyiidae Melander, 1902 | Zwergwollschweber | 82 | Arten | Taxom |
| Nadipteridae Lukashevich, 1995 | | 4 | Arten | Taxom |
| Nannochoristidae Tillyard, 1917 | | 20 | Arten | Taxom |
| Nannodastiidae Papp, 1980 | | 3 | Arten | Taxom |
| Natalimyzidae Barraclough ..., 2006 | | 1 | Art | Taxom |
| Necrotauliidae Handlirsch, 1906 | | 52 | Arten | Taxom |
| Nedubroviidae Bashkuev, 2011 | | 6 | Arten | Taxom |
| Nemestrinidae Macquart, 1834 | | 325 | Arten | Taxom |
| Neminidae Mcalpine, 1983 | | 14 | Arten | Taxom |
| Nemonychidae Bedel, 1882 | Ritterspornrüssler | 242 | Arten | Taxom |
| Neopseustidae Hering, 1925 | | 7 | Arten | Taxom |
| Neotheoridae Kirstensen, 1978 | | 0 | Arten | Taxom |
| Nepticulidae Stainton, 1854 | Zwergminierfalter | 1456 | Arten | Taxom |
| Neriidae Hendel, 1916 | | 122 | Arten | Taxom |
| Neurochaetidae Mcalpine, 1978 | | 30 | Arten | Taxom |
| Ningxiapsychidae Hong & Li, 2004 | | 1 | Art | Taxom |
| Nitidulidae Latreille, 1802 | Glanzkäfer | 1724 | Arten | Taxom |
| Noctuidae Latreille, 1809 | Erdraupen | 20314 | Arten | Taxom |
| Noctuiidae | | 1 | Art | Taxom |
| Nolidae Hampson, 1894 | Graueulchen | 2415 | Arten | Taxom |
| Nosodendridae Erichson, 1846 | Saftkäfer | 77 | Arten | Taxom |
| Noteridae C. G. Thomson, 1860 | Ruderschwimmer | 398 | Arten | Taxom |
| Nothybidae Frey, 1927 | | 9 | Arten | Taxom |
| Notodontidae Stephens, 1829 | Zahnspinner | 4733 | Arten | Taxom |
| Nycteribiidae Samouelle, 1819 | Fledermausfliegen | 75 | Arten | Taxom |
| Nymphalidae Rafinesque, 1815 | Edelfalter | 12809 | Arten | Taxom |
| Nymphomyiidae Tokunaga, 1932 | | 9 | Arten | Taxom |
| Oborocoleidae Kukalová, 1968 | | 2 | Arten | Taxom |
| Obrieniidae Zherikhin an..., 1994 | | 12 | Arten | Taxom |
| Ochodaeidae Mulsant & Rey, 1870 | | 227 | Arten | Taxom |
| Odiniidae Hendel, 1920 | | 79 | Arten | Taxom |
| Odontoceridae Wallengren, 1891 | | 183 | Arten | Taxom |
| Oeconesidae Tillyard, 1921 | | 21 | Arten | Taxom |
| Oecophoridae Bruand, 1851 | Breitflügelmotten | 4328 | Arten | Taxom |
| Oedemeridae Latreille, 1810 | Engdeckenflügler | 721 | Arten | Taxom |
| Oenosandridae Miller, 1991 | | 8 | Arten | Taxom |
| Oestridae Leach, 1815 | Biesfliegen | 253 | Arten | Taxom |
| Omalisidae Lacordaire, 1857 | Blutkäfer | 2 | Arten | Taxom |
| Omethidae LeConte, 1861 | | 28 | Arten | Taxom |
| Ommatidae Sharp & Muir, 1912 | | 204 | Arten | Taxom |
| Opetiidae Rondani, 1856 | | 10 | Arten | Taxom |
| Opomyzidae (Fallen, 1820) | Grasfliegen | 111 | Arten | Taxom |
| Opostegidae Meyrick, 1893 | | 149 | Arten | Taxom |
| Oreoleptidae Zloty, Sincl..., 2005 | | 1 | Art | Taxom |
| Orientisargidae Zhang, 2012 | | 1 | Art | Taxom |
| Ormyridae Förster, 1856 | | 141 | Arten | Taxom |
| Orphnidae Orphnus mash..., 1908 | | 1 | Art | Taxom |
| Orsodacnidae Thomson, 1859 | | 35 | Arten | Taxom |
| Orthophlebiidae Handlirsch, 1906 | | 169 | Arten | Taxom |
| Orussidae Newman, 1834 | | 77 | Arten | Taxom |
| Ostomatidae Reitter, 1882 | | 1 | Art | Taxom |
| Othniodellithidae Engel & Huang, 2016 | | 2 | Arten | Taxom |
| Otitidae (Macquart, 1835) | Schmuckfliegen | 740 | Arten | Taxom |
| Oxychirotidae (Meyrick, 1885) | | 1 | Art | Taxom |
| Oxycorynidae (Schoenherr, 1840) | | 116 | Arten | Taxom |
| Oxypeltidae Lacordaire, 1869 | | 5 | Arten | Taxom |
| Pachylembiidae Ross, 2001 | | 1 | Art | Taxom |
| Pachyneuridae Schiner, 1864 | | 12 | Arten | Taxom |
| Palaeomanteidae Handlirsch, 1906 | | 51 | Arten | Taxom |
| Palaeophoridae Rohdendorf, 1951 | | 1 | Art | Taxom |
| Palaeosetidae Turner, 1922 | | 5 | Arten | Taxom |
| Palaephatidae Davis, 1986 | | 39 | Arten | Taxom |
| Paleomelittidae Engel, 2001 | | 1 | Art | Taxom |
| Pallopteridae Loew, 1862 | Zitterfliegen | 113 | Arten | Taxom |
| Pamphiliidae Cameron, 1890 | Gespinstblattwespen | 241 | Arten | Taxom |
| Panorpidae Linnaeus, 1758 | Skorpionsfliegen | 632 | Arten | Taxom |
| Panorpodidae Byers, 1965 | | 32 | Arten | Taxom |
| Pantophthalmidae Williston, 1906 | | 28 | Arten | Taxom |
| Papilionidae Latreille, 1802 | Ritter | 1817 | Arten | Taxom |
| Parachoristidae Tillyard, 1937 | | 9 | Arten | Taxom |
| Parahygrobiidae Ponomarenko, 1977 | Ausgestorbene Familie | 1 | Art | Taxom |
| Parandrexidae Kirejtshuk, 1994 | | 7 | Arten | Taxom |
| Parapamphiliidae Rasnitsyn, 1968 | | 1 | Art | Taxom |
| Paraxymyiidae Rohdendorf, 1946 | | 13 | Arten | Taxom |
| Paroryssidae Martynov, 1925 | | 11 | Arten | Taxom |
| Passalidae Leach, 1815 | Zuckerkäfer | 1077 | Arten | Taxom |
| Passalopalpidae Boucher & Bai, 2016 | | 1 | Art | Taxom |
| Passandridae (Erichson, 1845) | | 6 | Arten | Taxom |
| Pediciidae Osten Sacken, 1860 | | 99 | Arten | Taxom |
| Pelecinidae Haliday, 1839 | | 58 | Arten | Taxom |
| Pelecorhynchidae Philip, 1941 | | 52 | Arten | Taxom |
| Peradeniidae Naumann & Ma..., 1985 | | 4 | Arten | Taxom |
| Pergidae Rohwer, 1911 | | 249 | Arten | Taxom |
| Perilampidae Latreille, 1809 | | 294 | Arten | Taxom |
| Periscelididae Oldenberg, 1914 | Saftfliegen | 120 | Arten | Taxom |
| Perissommatidae Colless, 1962 | | 13 | Arten | Taxom |
| Permocentropidae Martynov, 1932 | | 1 | Art | Taxom |
| Permochoristidae Tillyard, 1918 | | 217 | Arten | Taxom |
| Permocupedidae Martynov, 1933 | | 37 | Arten | Taxom |
| Permopanorpidae Tillyard, 1926 | | 10 | Arten | Taxom |
| Permosialidae Martynov, 1928 | | 30 | Arten | Taxom |
| Permosynidae Tillyard, 1924 | | 34 | Arten | Taxom |
| Permotanyderidae Riek, 1953 | | 3 | Arten | Taxom |
| Permotipulidae Tillyard, 1929 | | 3 | Arten | Taxom |
| Petrothrincidae Scott, 1985 | | 14 | Arten | Taxom |
| Phaeomyiidae (Verbeke, 1950) | Tausendfüßerfliegen | 7 | Arten | Taxom |
| Phalacridae Leach, 1815 | Glattkäfer | 315 | Arten | Taxom |
| Phengodidae LeConte, 1861 | Federleuchtkäfer | 357 | Arten | Taxom |
| Philopotamidae Stephens, 1829 | | 1524 | Arten | Taxom |
| Philorheithridae Mosely, 1936 | | 20 | Arten | Taxom |
| Phloeostichidae Reitter, 1911 | Rindenplattkäfer | 8 | Arten | Taxom |
| Phloiophilidae Kiesenwetter, 1863 | Doppelzahnwollhaarkäfer | 3 | Arten | Taxom |
| Phoridae Curtis, 1833 | Buckelfliegen | 4919 | Arten | Taxom |
| Phryganeidae (Leach, 1815) | | 146 | Arten | Taxom |
| Phryganopsychidae Wiggins, 1959 | | 4 | Arten | Taxom |
| Phthanoxenidae Engel & Huang, 2016 | | 1 | Art | Taxom |
| Phycosecidae Crowson, 1952 | | 7 | Arten | Taxom |
| Pieridae Duponchel, 1835 | Weißlinge | 2270 | Arten | Taxom |
| Piophilidae Macquart, 1835 | Käsefliegen | 170 | Arten | Taxom |
| Pipunculidae Walker, 1834 | Augenfliegen | 1808 | Arten | Taxom |
| Pisuliidae Ross, 1967 | | 9 | Arten | Taxom |
| Platygastridae Haliday, 1833 | | 1228 | Arten | Taxom |
| Platypezidae Fallen, 1815 | Pilzfliegen | 345 | Arten | Taxom |
| Platystomatidae Schiner, 1862 | Breitmundfliegen | 1329 | Arten | Taxom |
| Pleciodictyidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Pleciofungivoridae Rohdendorf, 1946 | | 82 | Arten | Taxom |
| Pleciomimidae Rodendorf, 1949 | | 30 | Arten | Taxom |
| Plectrotarsidae Mosely, 1953 | | 6 | Arten | Taxom |
| Pleocomidae LeConte, 1861 | | 39 | Arten | Taxom |
| Plumalexiidae Brothers, 2011 | | 1 | Art | Taxom |
| Plumariidae Bischoff, 1914 | | 7 | Arten | Taxom |
| Plutellidae Guenée, 1845 | Halbmotten | 412 | Arten | Taxom |
| Podabrocephalidae Pic, 1930 | | 1 | Art | Taxom |
| Polycentropodidae Ulmer, 1903 | | 1045 | Arten | Taxom |
| Pompilidae Latreille, 1805 | Wegwespen | 3515 | Arten | Taxom |
| Praeaulacidae Rasnitsyn, 1972 | | 86 | Arten | Taxom |
| Praeichneumonidae Rasnitsyn, 1983 | | 5 | Arten | Taxom |
| Praelateriidae Dolin, 1973 | | 1 | Art | Taxom |
| Praesiricidae Rasnitsyn, 1968 | | 15 | Arten | Taxom |
| Priasilphidae Crowson, 1973 | | 11 | Arten | Taxom |
| Prionoceridae Lacaordaire, 1857 | | 47 | Arten | Taxom |
| Procramptonomyiidae Kovalev, 1985 | | 9 | Arten | Taxom |
| Proctorenyxidae Lelej & Kozlov, 1999 | | 1 | Art | Taxom |
| Proctotrupidae Latreille, 1802 | Zehrwespen | 251 | Arten | Taxom |
| Prodoxidae Riley, 1881 | Rosen-Blattsackfalter | 135 | Arten | Taxom |
| Promecheilidae Lacordaire, 1859 | | 17 | Arten | Taxom |
| Proneottiophilidae Hennig, 1969 | | 1 | Art | Taxom |
| Propalticidae Crowson, 1952 | | 13 | Arten | Taxom |
| Prorhyacophilidae Riek, 1955 | | 3 | Arten | Taxom |
| Prosechamyiidae Blagoderov &..., 2007 | | 2 | Arten | Taxom |
| Prosepididontidae A Handlirsch, 1919 | | 1 | Art | Taxom |
| Prostomidae C. G. Thomson, 1859 | Schaufelkäfer | 33 | Arten | Taxom |
| Protapioceridae Ren, 1998 | | 4 | Arten | Taxom |
| Protempididae Ussatchov, 1968 | | 2 | Arten | Taxom |
| Protendipedidae Rohdendorf, 1962 | | 3 | Arten | Taxom |
| Proterhinidae (Fauvel, 1891) | | 2 | Arten | Taxom |
| Protobrachyceridae Rohdendorf, 1962 | | 3 | Arten | Taxom |
| Protocucujidae Crowson, 1954 | | 4 | Arten | Taxom |
| Protoligoneuridae Rohdendorf, 1962 | | 6 | Arten | Taxom |
| Protomeropidae Tillyard, 1926 | | 17 | Arten | Taxom |
| Protomphralidae Rohdendorf, 1957 | | 3 | Arten | Taxom |
| Protopleciidae Rohdendorf, 1946 | | 50 | Arten | Taxom |
| Protorhyphidae Handlirsch, 1906 | | 21 | Arten | Taxom |
| Prototheoridae Meyrick, 1917 | | 19 | Arten | Taxom |
| Protoxenidae Pohl, Beutel..., 2005 | | 1 | Art | Taxom |
| Psammocharidae (Yasumatsu, 1935) | | 0 | Arten | Taxom |
| Pselaphidae (Lameere, 1900) | Palpenkäfer | 5 | Arten | Taxom |
| Psephenidae Lacordaire, 1854 | Bachkäfer | 247 | Arten | Taxom |
| Pseudonannochoristidae Novokshonov, 1994 | | 2 | Arten | Taxom |
| Pseudopolycentropodidae Handlirsch, 1925 | | 16 | Arten | Taxom |
| Pseudopomyzidae (Mcalpine, 1966) | Scheingrasfliegen | 22 | Arten | Taxom |
| Pseudopulicidae Gao, Shih & Ren, 2012 | | 6 | Arten | Taxom |
| Pseudosiricidae Handlirsch, 1908 | | 2 | Arten | Taxom |
| Pseudostenolestidae Garrouste & Nel, 2015 | | 1 | Art | Taxom |
| Psilidae Macquart, 1835 | Nacktfliegen | 484 | Arten | Taxom |
| Psychidae Boisduval, 1828 | Echte Sackträger | 1449 | Arten | Taxom |
| Psychodidae Newman, 1834 | Schmetterlingsmücken | 3620 | Arten | Taxom |
| Psychomyiidae Walker, 1852 | | 553 | Arten | Taxom |
| Pterogeniidae Crowson, 1953 | | 24 | Arten | Taxom |
| Pterolonchidae Meyrick, 1918 | | 2 | Arten | Taxom |
| Pteromalidae Dalman, 1820 | | 4277 | Arten | Taxom |
| Pteronarcidae (Newman, 1853) | | 1 | Art | Taxom |
| Pterophoridae Zeller, 1841 | Federgeistchen | 2411 | Arten | Taxom |
| Ptiliidae Heer, 1843 | Federflügler | 1095 | Arten | Taxom |
| Ptilodactylidae Laporte, 1836 | | 498 | Arten | Taxom |
| Ptinidae Latreille, 1802 | Diebkäfer | 1915 | Arten | Taxom |
| Ptismidae Kirejtshuk &..., 2016 | | 1 | Art | Taxom |
| Ptychopteridae Osten Sacken, 1862 | Faltenmücken | 185 | Arten | Taxom |
| Pulicidae Billberg, 1820 | Menschenflöhe | 233 | Arten | Taxom |
| Pygiopsyllidae Wagner, 1939 | | 80 | Arten | Taxom |
| Pyralidae Latreille, 1802 | Echte Zünsler | 7765 | Arten | Taxom |
| Pyrgotidae Schiner, 1868 | | 384 | Arten | Taxom |
| Pyrochroidae Latreille, 1807 | Feuerkäfer | 172 | Arten | Taxom |
| Pythidae Solier, 1834 | Drachenkäfer | 18 | Arten | Taxom |
| Radiophronidae Ortega-Blanc..., 2010 | | 2 | Arten | Taxom |
| Rangomaramidae Jaschhof & D..., 2002 | Langflügel-Pilzmücken | 49 | Arten | Taxom |
| Rhaetaniidae (Krzemiń..., 2002) | | 1 | Art | Taxom |
| Rhagionemestriidae Ussatchov, 1968 | | 10 | Arten | Taxom |
| Rhagionempididae Rohdendorf, 1938 | | 5 | Arten | Taxom |
| Rhagionidae Latreille, 1802 | Schnepfenfliegen | 914 | Arten | Taxom |
| Rhagophthalmidae Olivier, 1907 | | 8 | Arten | Taxom |
| Rhiniidae Brauer & Ber..., 1889 | | 18 | Arten | Taxom |
| Rhinophoridae Robineau-Des..., 1863 | Asselfliegen | 221 | Arten | Taxom |
| Rhinorhipidae Lawrence, 1988 | | 1 | Art | Taxom |
| Rhipiceridae Latreille, 1834 | Fächerkäfer | 62 | Arten | Taxom |
| Rhipiphoridae Gemminger & ..., 1870 | Fächerkäfer | 83 | Arten | Taxom |
| Rhizophagidae (Shuey, 1996) | | 1 | Art | Taxom |
| Rhombocoleidae Rohdendorf, 1961 | | 25 | Arten | Taxom |
| Rhopalopsyllidae Oudemans, 1909 | | 133 | Arten | Taxom |
| Rhopalosomatidae Ashmead, 1896 | | 59 | Arten | Taxom |
| Rhyacophilidae Stephens, 1836 | | 61 | Arten | Taxom |
| Rhynchitidae Gistel, 1848 | Blattstecher | 98 | Arten | Taxom |
| Rhyphidae (Newman, 1834) | | 4 | Arten | Taxom |
| Richardidae Snow, 1896 | | 146 | Arten | Taxom |
| Richardiidae (Snow, 1896) | | 66 | Arten | Taxom |
| Riodinidae Grote, 1895 | Würfelfalter | 2235 | Arten | Taxom |
| Ripiphoridae Gemminger & ..., 1870 | Fächerkäfer | 183 | Arten | Taxom |
| Robinjohniidae Martynova, 1948 | | 2 | Arten | Taxom |
| Roeslerianidae Martins-Neto, 1997 | | 1 | Art | Taxom |
| Roeslerstammiidae Bruand, 1850 | | 42 | Arten | Taxom |
| Ropalomeridae Linder, 1930 | | 38 | Arten | Taxom |
| Roproniidae Bradley, 1905 | | 14 | Arten | Taxom |
| Rossianidae Gall, 1996 | | 1 | Art | Taxom |
| Rotoitidae BouÄek & No..., 1987 | | 2 | Arten | Taxom |
| Rutelidae (MacLeay, 1819) | Gartenkäfer | 480 | Arten | Taxom |
| Salpingidae Leach, 1815 | Scheinrüßler | 365 | Arten | Taxom |
| Sapygidae Latreille, 1810 | Keulenwespen | 46 | Arten | Taxom |
| Sarcophagidae Macquart, 1834 | Aasfliegen | 3765 | Arten | Taxom |
| Saturniidae Boisduval, 1837 | Augenspinner | 2812 | Arten | Taxom |
| Satyridae Boisduval, 1833 | Augenfalter | 1 | Art | Taxom |
| Saurophthiridae Ponomarenko, 1986 | | 2 | Arten | Taxom |
| Saxonagrionidae Nel & al., 1999 | | 1 | Art | Taxom |
| Scaphocoridae Popov, 1968 | | 1 | Art | Taxom |
| Scarabaeidae Latreille, 1802 | Blatthornkäfer | 42190 | Arten | Taxom |
| Scarabaidae | | 1 | Art | Taxom |
| Scathophagidae Robineau-Des..., 1830 | Dungfliegen | 841 | Arten | Taxom |
| Scatopsidae Newman, 1834 | Dungmücken | 577 | Arten | Taxom |
| Scelionidae Haliday, 1839 | | 3173 | Arten | Taxom |
| Scenopinidae Burmeister, 1835 | Fensterfliegen | 451 | Arten | Taxom |
| Schizocoleidae Rohdendorf, 1961 | | 89 | Arten | Taxom |
| Schizophoridae Ponomarenko, 1968 | | 55 | Arten | Taxom |
| Schizopodidae (LeConte, 1859) | | 10 | Arten | Taxom |
| Schreckensteiniidae Fletcher, 1929 | | 5 | Arten | Taxom |
| Sciadoceridae (Schmitz, 1929) | | 1 | Art | Taxom |
| Sciaridae Billberg, 1820 | Trauermücken | 388 | Arten | Taxom |
| Sciomyzidae Fallen, 1820 | Hornfliegen | 791 | Arten | Taxom |
| Scirtidae Fleming, 1821 | Sumpffieberkäfer | 919 | Arten | Taxom |
| Sclerogibbidae Ashmead, 1902 | | 27 | Arten | Taxom |
| Scolebythidae Evans, 1963 | | 29 | Arten | Taxom |
| Scoliidae Leach, 1815 | Dolchwespen | 389 | Arten | Taxom |
| Scolytidae (Latreille, 1807) | Borkenkäfer | 19 | Arten | Taxom |
| Scraptiidae Mulsant, 1856 | Scheinstachelkäfer | 481 | Arten | Taxom |
| Scydmaenidae (Leach, 1815) | Ameisenkäfer | 5845 | Arten | Taxom |
| Scythrididae Rebel, 1901 | Heidefalter | 118 | Arten | Taxom |
| Sematuridae Guenée, 1858 | | 21 | Arten | Taxom |
| Sepsidae Walker, 1833 | Schwingfliegen | 542 | Arten | Taxom |
| Septiventeridae Bai & al., 2013 | | 1 | Art | Taxom |
| Sepulcidae Rasnitsyn, 1968 | | 45 | Arten | Taxom |
| Serendipidae Evenhuis, 1994 | | 3 | Arten | Taxom |
| Sericostomatidae Stephens, 1836 | | 98 | Arten | Taxom |
| Serphitidae Brues, 1937 | | 19 | Arten | Taxom |
| Sesiidae Boisduval, 1828 | Glasflügler | 1564 | Arten | Taxom |
| Siberhyphidae Kovalev, 1985 | | 1 | Art | Taxom |
| Sibiriothaumatidae Sukatcheva &..., 1998 | | 1 | Art | Taxom |
| Sierolomorphidae Krombein, 1951 | | 8 | Arten | Taxom |
| Signiphoridae Howard, 1894 | | 110 | Arten | Taxom |
| Silphidae Latreille, 1807 | Aaskäfer | 281 | Arten | Taxom |
| Silvanidae Kirby, 1837 | Plattkäfer | 607 | Arten | Taxom |
| Simaethistidae Minet, 1991 | | 2 | Arten | Taxom |
| Simuliidae Newman, 1834 | Kriebelmücken | 2543 | Arten | Taxom |
| Sinisilvanidae (Hong, 2002) | | 1 | Art | Taxom |
| Sinoryssidae Hong, 1983 | | 1 | Art | Taxom |
| Sinosiricidae Hong You-Chong, 1975 | | 1 | Art | Taxom |
| Siricidae Billberg, 1820 | Holzwespen | 113 | Arten | Taxom |
| Smicripidae Horn, 1879 | | 6 | Arten | Taxom |
| Sojanocoleidae Martynov, 1932 | | 1 | Art | Taxom |
| Somabrachyidae Hampson, 1920 | | 7 | Arten | Taxom |
| Somatiidae Hendel, 1935 | | 8 | Arten | Taxom |
| Sonidae Pritykina, 1986 | | 1 | Art | Taxom |
| Soyaniidae Shcherbakov, 2015 | | 1 | Art | Taxom |
| Spaniidae (Nagatomi, 1982) | | 3 | Arten | Taxom |
| Spathiopterygidae Engel & Orte..., 2013 | | 5 | Arten | Taxom |
| Sphaeritidae Schuckard, 1839 | Scheinstutzkäfer | 7 | Arten | Taxom |
| Sphaeriusidae Erichson, 1845 | Kugelkäfer | 28 | Arten | Taxom |
| Sphaeroceridae Macquart, 1835 | Dungfliegen | 2069 | Arten | Taxom |
| Sphecidae Latreille, 1802 | Grabwespen | 1023 | Arten | Taxom |
| Sphecorydaloididae Pinto, 1994 | | 1 | Art | Taxom |
| Sphindidae Jacquelin du..., 1860 | Schleimpilzkäfer | 70 | Arten | Taxom |
| Sphingidae Latreille, 1802 | Schwärmer | 2398 | Arten | Taxom |
| Srokalarvidae Haug & al., 2016 | | 1 | Art | Taxom |
| Staphylinidae Lameere, 1900 | Halbflügler | 66177 | Arten | Taxom |
| Stenopsychidae Martynov, 1924 | | 123 | Arten | Taxom |
| Stenotrachelidae C. G. Thomson, 1859 | | 37 | Arten | Taxom |
| Stenotritidae (Michener, 2000) | | 1 | Art | Taxom |
| Stephanidae Leach, 1815 | | 197 | Arten | Taxom |
| Stephanocircidae Wagner, 1928 | | 52 | Arten | Taxom |
| Stigmaphronidae Kozlov, 1975 | | 27 | Arten | Taxom |
| Stivaliidae Mardon, 1978 | | 109 | Arten | Taxom |
| Stolamissidae Liu & Engel, 2007 | | 1 | Art | Taxom |
| Strashilidae Rasnitsyn, 1992 | | 3 | Arten | Taxom |
| Stratiomyidae Latreille, 1802 | Waffenfliegen | 3176 | Arten | Taxom |
| Streblidae (Kolenati, 1863) | | 154 | Arten | Taxom |
| Strongylophthalmyiidae Hennig, 1940 | | 84 | Arten | Taxom |
| Stylopidae Kirby, 1813 | | 324 | Arten | Taxom |
| Symmocidae (Gozmany, 1957) | | 1 | Art | Taxom |
| Synchroidae Lacordaire, 1859 | | 3 | Arten | Taxom |
| Synteliidae Lewis, 1882 | | 14 | Arten | Taxom |
| Syntomidae (Herrich Scha..., 1846) | Scheinwidderchen | 21 | Arten | Taxom |
| Syringogastridae Prado, 1969 | | 15 | Arten | Taxom |
| Syrphidae Latreille, 1802 | Larven: Blattlaus-Löwen | 8557 | Arten | Taxom |
| Syspastoxyelidae Engel & Huang, 2016 | | 1 | Art | Taxom |
| Tabanidae Latreille, 1802 | Bremsen | 5407 | Arten | Taxom |
| Tachinidae (Robineau-Des..., 1830) | Raupenfliegen | 12291 | Arten | Taxom |
| Tachiniscidae (Kertesz, 1903) | | 1 | Art | Taxom |
| Taimyrocoridae Popov, 2016 | | 1 | Art | Taxom |
| Taldycupedidae Rohdendorf, 1961 | | 35 | Arten | Taxom |
| Tanaostigmatidae Howard, 1890 | | 94 | Arten | Taxom |
| Tanyderidae Alexander, 1919 | | 72 | Arten | Taxom |
| Tanyderophryneidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Tanypezidae Rondani, 1856 | Streckfußfliegen | 24 | Arten | Taxom |
| Tasimiidae Riek, 1968 | | 9 | Arten | Taxom |
| Tasmosalpingidae Lawrence and..., 1991 | | 2 | Arten | Taxom |
| Taymyrelectronidae Botosaneanu ..., 1983 | | 1 | Art | Taxom |
| Telegeusidae (LeConte, 1861) | | 20 | Arten | Taxom |
| Tenebrionidae Latreille, 1802 | Dunkelkäfer | 9493 | Arten | Taxom |
| Tenthredinidae Latreille, 1804 | Blattwespen | 3405 | Arten | Taxom |
| Tephritidae Newman, 1834 | Bohrfliegen | 6039 | Arten | Taxom |
| Teratomyzidae Hennig, 1969 | | 11 | Arten | Taxom |
| Teredidae Seidlitz, 1888 | | 147 | Arten | Taxom |
| Tethepomyiidae Grimaldi & A..., 2008 | | 1 | Art | Taxom |
| Tethinidae (Hendel, 1916) | | 228 | Arten | Taxom |
| Tetracampidae Förster, 1856 | | 67 | Arten | Taxom |
| Tetratomidae Billberg, 1820 | Keulendüsterkäfer | 142 | Arten | Taxom |
| Thanerocleridae Chapin, 1921 | | 18 | Arten | Taxom |
| Thaumaleidae Bezzi, 1913 | Dunkelmücken | 201 | Arten | Taxom |
| Thaumatomeropidae Willmann, 1978 | | 6 | Arten | Taxom |
| Therevidae Newman, 1834 | Dolchfliegen | 1473 | Arten | Taxom |
| Throscidae Laporte, 1840 | Hüpfkäfer | 202 | Arten | Taxom |
| Thyatiridae (Blake, 1936) | Eulenspinner | 0 | Arten | Taxom |
| Thynnidae Shuckard, 1841 | | 750 | Arten | Taxom |
| Thyrididae Herrich-Schä..., 1846 | Fensterfleckchen | 630 | Arten | Taxom |
| Tillyardipteridae Lukashevich ..., 1999 | | 2 | Arten | Taxom |
| Tineidae Latreille, 1810 | Echte Motten | 3785 | Arten | Taxom |
| Tineodidae Meyrick, 1885 | | 15 | Arten | Taxom |
| Tiphiidae Leach, 1815 | Rollwespen | 727 | Arten | Taxom |
| Tipulidae Latreille, 1802 | Bachmücken | 17319 | Arten | Taxom |
| Tipulodictyidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Tipulopleciidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Tischeriidae Spuler, 1898 | Schopfstirnfalter | 186 | Arten | Taxom |
| Tomiochoristidae Martynova, 1958 | | 6 | Arten | Taxom |
| Torridincolidae Steffan, 1964 | | 43 | Arten | Taxom |
| Tortricidae Latreille, 1803 | Blattroller | 13843 | Arten | Taxom |
| Torymidae Walker, 1833 | Erzwespen | 1253 | Arten | Taxom |
| Trachypachidae C. G. Thomson, 1857 | | 91 | Arten | Taxom |
| Triadocupedidae (Ponomarenko, 1966) | | 1 | Art | Taxom |
| Triaplidae Ponomarenko, 1977 | Ausgestorbene Familie | 4 | Arten | Taxom |
| Trichoceridae Rondani, 1841 | Wintermücken | 470 | Arten | Taxom |
| Trichogrammatidae Haliday, 1851 | | 915 | Arten | Taxom |
| Tricoleidae (Ponomarenko, 1969) | | 18 | Arten | Taxom |
| Trictenotomidae Blanchard, 1845 | | 18 | Arten | Taxom |
| Trigonalidae (Cresson, 1887) | Leistenwespen | 61 | Arten | Taxom |
| Trigonalyidae | | 3 | Arten | Taxom |
| Tritarsidae Hong, 2002 | | 1 | Art | Taxom |
| Trogidae (MacLeay, 1819) | Erdkäfer | 584 | Arten | Taxom |
| Trogossitidae Latreille, 1802 | Flachkäfer | 479 | Arten | Taxom |
| Tshekarchiereidae Novokshonov, 1997 | | 1 | Art | Taxom |
| Tshekardocoleidae Rohdendorf, 1944 | | 22 | Arten | Taxom |
| Uenoidae Iwata, 1927 | | 25 | Arten | Taxom |
| Ulidiidae Macquart, 1835 | Metallfliegen | 105 | Arten | Taxom |
| Ulodidae Pascoe, 1869 | | 9 | Arten | Taxom |
| Ulyanidae (Zherikhin, 1993) | | 2 | Arten | Taxom |
| Undopterigidae (Kozlov, 1988) | | 3 | Arten | Taxom |
| Uraloptysmatidae (VD Ivanov, 1992) | | 1 | Art | Taxom |
| Uraniidae Blanchard, 1845 | Uraniafalter | 715 | Arten | Taxom |
| Uranorhagionidae Zhang, Yang ..., 2010 | | 5 | Arten | Taxom |
| Urodidae Kyrki, 1984 | | 24 | Arten | Taxom |
| Urolibellulidae Zeiri & al., 2015 | | 1 | Art | Taxom |
| Valeseguyidae Amorim & Gri..., 2006 | | 3 | Arten | Taxom |
| Vanhorniidae Crawford, 1909 | | 2 | Arten | Taxom |
| Vermileonidae Williston, 1886 | Wurmlöwen | 72 | Arten | Taxom |
| Vermipsyllidae Wagner, 1889 | | 43 | Arten | Taxom |
| Vesperidae Mulsant, 1839 | | 93 | Arten | Taxom |
| Vespidae Leach, 1815 | Echte Wespen | 4356 | Arten | Taxom |
| Vitimotauliidae Sukatsheva, 1968 | | 25 | Arten | Taxom |
| Vladipteridae Shcherbakov, 1995 | | 4 | Arten | Taxom |
| Volitorididae Hong, 1982 | | 1 | Art | Taxom |
| Whalleyanidae Minet, 1991 | | 2 | Arten | Taxom |
| Xenasteiidae Hardy, 1980 | | 13 | Arten | Taxom |
| Xenidae Pohl & Beutel, 2005 | | 107 | Arten | Taxom |
| Xenochoristidae (Riek, 1953) | | 1 | Art | Taxom |
| Xiphiopsyllidae Wagner, 1939 | | 8 | Arten | Taxom |
| Xiphocentronidae Schmid, 1982 | | 156 | Arten | Taxom |
| Xiphydriidae Leach, 1819 | Schwertwespen | 63 | Arten | Taxom |
| Xyelidae Newman, 1835 | Urblattwespen | 213 | Arten | Taxom |
| Xyelotomidae Rasnitsyn, 1968 | | 23 | Arten | Taxom |
| Xyelydidae Rasnitsyn, 1968 | | 34 | Arten | Taxom |
| Xylomyidae Verrall, 1901 | Holz-Waffenfliegen | 163 | Arten | Taxom |
| Xylophagidae Fallen, 1810 | Holzfliegen | 168 | Arten | Taxom |
| Xyloryctidae Meyrick, 1890 | | 1079 | Arten | Taxom |
| Yantarocentridae Ivanov & Mel..., 2015 | | 1 | Art | Taxom |
| Yponomeutidae Stephens, 1829 | Gespinst- und Knospenmotten | 895 | Arten | Taxom |
| Ypsolophidae Guenée, 1845 | Knospenmotten | 192 | Arten | Taxom |
| Zhangsolvidae Nagatomi & Yang, 1998 | | 8 | Arten | Taxom |
| Zopheridae Solier, 1834 | Rindenkäfer | 1163 | Arten | Taxom |
| Zygaenidae Latreille, 1809 | Blutströpfchen | 906 | Arten | Taxom |
