| Acanaloniidae Amyot and Se..., 1843 | | 121 | Arten | Taxom |
| Acanthocnemidae Crowson, 1964 | | 5 | Arten | Taxom |
| Acanthopidae Burmeister, 1838 | | 102 | Arten | Taxom |
| Acanthopteroctetidae Davis, 1978 | | 8 | Arten | Taxom |
| Acanthosomatidae Signoret, 1864 | Bauchkielwanzen | 294 | Arten | Taxom |
| Acartophthalmidae Czerny, 1928 | Augenstoppelfliegen | 8 | Arten | Taxom |
| Achilidae Stål, 1866 | Rindenzikaden | 598 | Arten | Taxom |
| Aclerdidae Ferris, 1937 | | 69 | Arten | Taxom |
| Acmaeoblattidae Durden, 1969 | | 4 | Arten | Taxom |
| Acrididae MacLeay, 1819 | Feldheuschrecken | 7637 | Arten | Taxom |
| Acroceridae Leach, 1815 | Kugelfliegen | 462 | Arten | Taxom |
| Actinoscytinidae (Evans, 1956) | | 1 | Art | Taxom |
| Adelgidae Heinze, 1962 | Fichtengallenläuse | 130 | Arten | Taxom |
| Adelidae Bruand, 1851 | Langfühlermotten | 384 | Arten | Taxom |
| Adeloblattidae Durden, 1969 | | 4 | Arten | Taxom |
| Adeloneuridae Carpenter, 1938 | | 1 | Art | Taxom |
| Ademosynidae Ponomarenko, 1968 | | 74 | Arten | Taxom |
| Aderidae Winkler, 1927 | Baummulmkäfer | 923 | Arten | Taxom |
| Adiheterothripidae Shumsher, 1946 | | 2 | Arten | Taxom |
| Adocimycolidae Poinar and Vega, 2023 | | 1 | Art | Taxom |
| Adumbratomorphidae Gorochov, 1987 | | 1 | Art | Taxom |
| Aenictopecheidae Usinger, 1932 | | 24 | Arten | Taxom |
| Aeolothripidae Uzel, 1895 | | 200 | Arten | Taxom |
| Aepophilidae Puton, 1879 | | 1 | Art | Taxom |
| Aerophasmidae Martynov, 1928 | | 20 | Arten | Taxom |
| Aeroplanidae Tillyard, 1918 | | 5 | Arten | Taxom |
| Aetalionidae Spinola, 1850 | | 41 | Arten | Taxom |
| Aetheogrammatidae Ren & Michae..., 2008 | | 5 | Arten | Taxom |
| Agaonidae Walker, 1848 | Feigenwespen | 683 | Arten | Taxom |
| Agapythidae Sen Gupta an..., 1969 | | 1 | Art | Taxom |
| Agathemeridae Bradler, 2003 | | 10 | Arten | 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 |
| Albiococcidae Koteja, 2004 | | 1 | Art | Taxom |
| Alerollidae Kaddumi, 2005 | | 1 | Art | Taxom |
| Alexarasniidae Gorochov, 2011 | | 5 | Arten | Taxom |
| Alexiidae Imhoff, 1856 | Kugelkäfer | 5 | Arten | Taxom |
| Aleyrodidae Westwood, 1840 | Mottenschildläuse Mottenläuse | 1712 | Arten | Taxom |
| Alienopteridae Bai & al., 2016 | | 14 | 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 |
| Alydidae Amyot & Serv..., 1843 | Krummfühlerwanzen | 334 | Arten | Taxom |
| Ambermantidae Grimaldi, 2003 | | 1 | Art | Taxom |
| Ambloblattidae Durden, 1969 | | 1 | Art | Taxom |
| Amboneuridae Carpenter, 1980 | | 1 | Art | Taxom |
| Amorphoscelidae Stål, 1877 | | 105 | Arten | Taxom |
| Ampelipteridae Haupt, 1941 | | 1 | Art | Taxom |
| Amphientomidae Enderlein, 1903 | | 116 | Arten | Taxom |
| Amphipsocidae Mockford, 1978 | | 189 | Arten | Taxom |
| Amphizoidae LeConte, 1853 | Forellenbachkäfer | 6 | Arten | Taxom |
| Ampulicidae Shuckard, 1840 | Schaben-Grabwespen | 252 | Arten | Taxom |
| Anaplectidae Walker, 1868 | | 1 | Art | Taxom |
| Anaxyelidae Martynov, 1925 | | 45 | Arten | Taxom |
| Ancistropsyllidae Toumanoff & ..., 1947 | | 3 | Arten | Taxom |
| Andesembiidae Ross, 2003 | | 7 | Arten | Taxom |
| Andesianidae Davis & Gentili, 2003 | | 3 | Arten | Taxom |
| Andrenidae Webster, 1913 | Erdbienen | 3343 | Arten | Taxom |
| Anelcanidae Carpenter, 1986 | | 2 | Arten | Taxom |
| Aneuretopsychidae Rasnitsyn & ..., 1990 | | 7 | Arten | Taxom |
| Angarosphecidae Rasnitsyn, 1975 | | 9 | Arten | Taxom |
| Anisacanthidae Günther, 1953 | | 31 | Arten | Taxom |
| Anisembiidae Davis, 1940 | | 127 | Arten | Taxom |
| Anisolabididae Verhoeff, 1902 | | 104 | Arten | Taxom |
| Anisopodidae Knab, 1912 | Fenstermücken | 244 | Arten | Taxom |
| Anoecidae | | 1 | Art | Taxom |
| Anomalogrammatidae Carpenter, 1943 | | 1 | Art | 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 |
| Anostostomatidae Saussure, 1859 | | 253 | Arten | Taxom |
| Ansorgiidae Krzeminski &..., 1993 | | 1 | Art | Taxom |
| Antefungivoridae Rohdendorf, 1938 | | 29 | Arten | Taxom |
| Antemylacridae Durden, 1972 | | 1 | Art | Taxom |
| Anthelidae Turner, 1904 | | 203 | Arten | Taxom |
| Anthicidae Latreille, 1819 | Blumenkäfer | 2317 | Arten | Taxom |
| Anthocephalidae Kaddumi, 2005 | | 1 | Art | Taxom |
| Anthocoridae Fieber, 1837 | Blumenwanzen | 362 | 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 |
| Anthracoblattinidae Durden, 1969 | | 37 | Arten | Taxom |
| Anthracoptilidae Handlirsch, 1922 | | 24 | Arten | Taxom |
| Anthracothremmidae Handlirsch, 1906 | | 2 | Arten | Taxom |
| Anthribidae Billberg, 1820 | Breitrüßler | 3344 | Arten | Taxom |
| Antipodoeciidae Ross, 1967 | | 1 | Art | Taxom |
| Apachelytridae Carpenter & ..., 1964 | | 1 | Art | Taxom |
| Apachyidae Verhoeff, 1902 | | 10 | Arten | Taxom |
| Apataniidae Wallengren, 1886 | | 295 | Arten | Taxom |
| Apatelodidae Neumoegen & ..., 1894 | | 11 | Arten | Taxom |
| Aphalaridae Löw, 1879 | | 760 | Arten | Taxom |
| Aphelinidae Thomson, 1876 | | 1423 | Arten | Taxom |
| Aphelocheiridae Fieber, 1851 | Grundwanzen | 119 | Arten | Taxom |
| Apheloneuridae Carpenter, 1976 | | 3 | Arten | Taxom |
| Aphididae Latreille, 1802 | Blattläuse | 4957 | Arten | Taxom |
| Aphodiidae Leach, 1815 | Dungkäfer | 32 | Arten | Taxom |
| Aphrophoridae Evans, 1946 | Schaumzikaden | 834 | Arten | Taxom |
| Aphylidae Bergroth, 1906 | | 2 | Arten | Taxom |
| Apidae Latreille, 1802 | Bienen | 7436 | Arten | Taxom |
| Apioceridae Bigot, 1852 | | 154 | Arten | Taxom |
| Apithanidae Handlirsch, 1911 | | 1 | Art | Taxom |
| Appertiidae Paulian, 1965 | | 1 | Art | Taxom |
| Apsidoneuridae Carpenter, 1961 | | 2 | Arten | Taxom |
| Apsilocephalidae Nagatomi & al., 1991 | | 7 | Arten | Taxom |
| Aptenoperissidae Rasnitsyn & ..., 2016 | | 1 | Art | Taxom |
| Apteropanorpidae Byers, 1965 | | 4 | Arten | Taxom |
| Apticoccidae Vea & Grimaldi, 2015 | | 3 | Arten | Taxom |
| Aradidae Spinola, 1837 | Rindenwanzen | 753 | Arten | Taxom |
| Araripeblattidae Martins-Neto..., 2010 | | 8 | Arten | Taxom |
| Araripeneuridae Martins-Neto..., 1989 | | 7 | Arten | Taxom |
| Archaeatropidae Baz & Ortuño, 2000 | | 17 | 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 |
| Archegocimicidae Handlirsch, 1906 | | 40 | Arten | Taxom |
| Archelytridae Carpenter, 1933 | | 2 | Arten | Taxom |
| Archembiidae Ross, 2001 | | 27 | Arten | Taxom |
| Archeocrypticidae Kaszab, 1964 | | 66 | Arten | Taxom |
| Archeorhinotermitidae Krishna & Gr..., 2003 | | 5 | Arten | Taxom |
| Archeosmylidae Riek, 1953 | | 4 | Arten | Taxom |
| Archescytinidae Tillyard, 1926 | | 68 | Arten | Taxom |
| Archiconiopterygidae Ansorge, 1996 | | 1 | Art | Taxom |
| Archijassidae Becker-Migdi..., 1962 | | 27 | Arten | Taxom |
| Archilimoniidae Krzeminski &..., 2003 | | 1 | Art | Taxom |
| Archimylacridae Handlirsch, 1906 | | 307 | Arten | Taxom |
| Archipanorpidae Tillyard, 1917 | | 1 | Art | Taxom |
| Archiprobnidae Sharov, 1961 | | 3 | Arten | Taxom |
| Archipseudophasmatidae Zompro, 2001 | | 3 | Arten | Taxom |
| Archipsocidae Enderlein, 1903 | | 83 | Arten | Taxom |
| Archipsyllidae Handlirsch, 1908 | | 12 | Arten | Taxom |
| Archisargidae Rohdendorf, 1962 | | 42 | Arten | Taxom |
| Archisialidae Martynov, 1933 | | 1 | Art | Taxom |
| Archizelmiridae Rohdendorf, 1962 | | 5 | Arten | Taxom |
| Archoblattinidae (Schneider, 1983) | | 5 | Arten | Taxom |
| Archotermopsidae Engel, Grima..., 2009 | | 6 | Arten | Taxom |
| Arctiidae Leach, 1815 | Bären | 894 | Arten | Taxom |
| Argentinoblattidae Martins-Neto..., 2005 | | 42 | Arten | Taxom |
| Argidae Konow, 1890 | Bürstenhornblattwespen | 505 | Arten | Taxom |
| Arixeniidae Burr, 1911 | | 2 | Arten | Taxom |
| Arnoldidae Koteja, 2008 | | 2 | Arten | Taxom |
| Artematopodidae Lacordaire, 1857 | | 54 | Arten | Taxom |
| Artheneidae Stål, 1872 | | 22 | Arten | Taxom |
| Artiidae | | 0 | Arten | Taxom |
| Ascalaphidae Rambur, 1842 | Schmetterlingshafte | 369 | Arten | Taxom |
| Ascalochrysidae Ren & Makarkin, 2009 | | 1 | Art | Taxom |
| Aschiphasmatidae Brunner von ..., 1893 | | 128 | Arten | Taxom |
| Ascololepidopterigidae Zhang & al., 2013 | | 3 | Arten | Taxom |
| Asienthomidae (Martynov, 1926) | | 0 | Arten | Taxom |
| Asilidae Latreille, 1802 | Jagdfliegen | 9562 | Arten | Taxom |
| Asiochaoboridae Hong & Wang, 1990 | | 4 | Arten | Taxom |
| Asiocoleidae Rohdendorf, 1961 | | 4 | Arten | Taxom |
| Asiopsocidae Mockford & G..., 1976 | | 15 | Arten | Taxom |
| Aspidytidae Ribera, Beu..., 2002 | | 3 | Arten | Taxom |
| Asteiidae Rondani, 1856 | Feinfliegen | 161 | Arten | Taxom |
| Asterolecaniidae Cockerell, 1896 | Pockenläuse | 354 | Arten | Taxom |
| Atactophlebiidae Martynov, 1930 | | 7 | 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 |
| Australembiidae Ross, 1963 | | 19 | 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 |
| Austroperlidae Tillyard, 1921 | | 19 | Arten | Taxom |
| Autostichidae Le Marchand, 1947 | Zwergpalpenmotten | 454 | Arten | Taxom |
| Aviorrhynchidae Nel & al., 2013 | | 1 | Art | Taxom |
| Avioxyelidae Nel, Engel,..., 2013 | | 1 | Art | Taxom |
| Awesomidae | | 1 | Art | Taxom |
| Axymyiidae Rohdendorf, 1946 | | 18 | Arten | Taxom |
| Babinskaiidae Martins-Neto..., 1989 | | 8 | Arten | Taxom |
| Bacillidae Brunner von ..., 1893 | | 60 | Arten | Taxom |
| Bacunculidae (Brunner, 1893) | | 1 | Art | 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 |
| Baissogryllidae Gorochov, 1985 | | 37 | Arten | Taxom |
| Baissomantidae Gratshev & Z..., 1993 | | 2 | Arten | Taxom |
| Baissopteridae Martynova, 1961 | | 22 | Arten | Taxom |
| Bajanzhargalanidae Storozhenko, 1992 | | 8 | Arten | Taxom |
| Bajsaphididae Homan, Zyla ..., 2015 | | 6 | Arten | Taxom |
| Baleyopterygidae N.D. Siniche..., 1985 | | 18 | Arten | Taxom |
| Barbarochthonidae Scott, 1985 | | 1 | Art | Taxom |
| Bardocoleidae Zalessky, 1947 | | 3 | Arten | Taxom |
| Baryshnyalidae Ilger & Brau..., 2011 | | 1 | Art | Taxom |
| Batrachedridae Heinemann & ..., 1876 | | 186 | Arten | Taxom |
| Bedelliidae (Stainton, 1849) | | 1 | Art | Taxom |
| Beesoniidae Ferris, 1950 | | 18 | Arten | Taxom |
| Belidae Schönherr, 1826 | | 632 | Arten | Taxom |
| Bellodermatidae Zhao & al, 2010 | | 2 | Arten | Taxom |
| Belmontiidae Tillyard, 1919 | | 1 | Art | Taxom |
| Belohinidae Paulian, 1959 | | 1 | Art | Taxom |
| Belostomatidae Leach, 1815 | Riesenwanzen | 208 | Arten | Taxom |
| Beraeidae Wallengren, 1891 | | 65 | Arten | Taxom |
| Berendtimiridae Winkler, 1987 | | 1 | Art | Taxom |
| Berothidae Handlirsch, 1906 | | 135 | Arten | Taxom |
| Berytidae Fieber, 1851 | Keulenwanzen | 219 | Arten | Taxom |
| Bethylidae Halliday, 1839 | Plattwespen | 1559 | Arten | Taxom |
| Bethylonymidae Rasnitsyn, 1975 | | 23 | Arten | Taxom |
| Bibionidae Fleming, 1821 | Haarmücken | 1287 | Arten | Taxom |
| Bintoniellidae Handlirsch, 1937 | | 12 | Arten | Taxom |
| Biphyllidae LeConte, 1861 | Buchenpilzkäfer | 106 | Arten | Taxom |
| Bittacidae Handlirsch, 1906 | Mückenhafte | 344 | Arten | Taxom |
| Biturritiidae (Metcalf, 1929) | | 10 | Arten | Taxom |
| Blaberidae Saussure, 1864 | | 1603 | Arten | Taxom |
| Blasticotomidae Thomson, 1871 | | 6 | Arten | Taxom |
| Blastobasidae (Meyrick, 1894) | | 20 | Arten | Taxom |
| Blattellidae (Karny, 1908) | Kleinschaben | 1380 | Arten | Taxom |
| Blattidae Stephens, 1829 | Schaben | 1032 | Arten | Taxom |
| Blattinopsidae Bolton, 1925 | | 52 | Arten | Taxom |
| Blattocoleidae Zeuner, 1933 | | 3 | Arten | Taxom |
| Blattogryllidae Rasnitsyn, 1976 | | 22 | Arten | Taxom |
| Blattulidae Vishnyokova, 1982 | | 107 | Arten | Taxom |
| Blephariceridae Loew, 1861 | Lidmücken | 356 | Arten | Taxom |
| Blissidae Stål, 1862 | Schmalwanzen | 326 | 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 |
| Boopiidae Mjöberg, 1910 | | 50 | Arten | Taxom |
| Boreidae Latreille, 1816 | Winterhafte | 35 | Arten | Taxom |
| Boreoscytidae Becker-Migdi..., 1949 | | 3 | 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 |
| Bouretidae Martins-Neto, 2001 | | 2 | 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 |
| Bradyblattidae Durden, 1969 | | 91 | Arten | Taxom |
| Bradynobaenidae Saussure, 1892 | | 138 | Arten | Taxom |
| Bradyporidae (Burmeister, 1838) | Sattelschrecken | 5 | 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 |
| Brongniartiellidae Martynova, 1949 | | 8 | Arten | Taxom |
| Bryopsocidae (Mockford, 1984) | | 2 | Arten | Taxom |
| Buprestidae Leach, 1815 | Prachtkäfer | 9428 | Arten | Taxom |
| Burmacoccidae Koteja, 2004 | | 1 | Art | Taxom |
| Burmitaphididae Poinar & Brown, 2005 | | 2 | Arten | Taxom |
| Byrrhidae Latreille, 1804 | Pillenkäfer | 521 | Arten | Taxom |
| Byturidae Jacquelin du..., 1858 | Blütenfresser | 32 | Arten | Taxom |
| Cacurgidae Handlirsch, 1911 | | 7 | Arten | Taxom |
| Caeciliusidae Kolbe, 1880 | | 686 | Arten | Taxom |
| Calamoceratidae Ulmer, 1905 | | 257 | Arten | Taxom |
| Caliscelidae Amyot & Serv..., 1843 | Walzenzikaden | 242 | Arten | Taxom |
| Callaphididae (Borner, 1952) | Zierläuse | 30 | Arten | Taxom |
| Callidulidae Moore, 1877 | | 59 | Arten | Taxom |
| Callipappidae Koteja, 1996 | | 8 | Arten | Taxom |
| Callipharixenidae Pierce, 1918 | | 1 | Art | Taxom |
| Calliphoridae Brauer & Ber..., 1889 | Schmeißfliegen | 2420 | Arten | Taxom |
| Callirhipidae Emden, 1924 | | 127 | Arten | Taxom |
| Caloblattinidae Vršanský & A..., 2000 | | 12 | Arten | Taxom |
| Calocidae Ross, 1967 | | 25 | Arten | Taxom |
| Caloneuridae Handlirsch, 1906 | | 21 | Arten | Taxom |
| Calophyidae Vondracek, 1957 | | 91 | Arten | Taxom |
| Calopsocidae (Pearman, 1936) | | 34 | Arten | Taxom |
| Camillidae Frey, 1921 | Nagetierfliegen | 46 | Arten | Taxom |
| Camptoneuritidae Martynov, 1930 | | 2 | Arten | Taxom |
| Canaceidae (Jones, 1906) | | 149 | Arten | Taxom |
| Canacidae Jones, 1906 | Dünenfliegen | 30 | Arten | Taxom |
| Canadaphididae Richards, 1966 | | 4 | Arten | Taxom |
| Cantacaderidae (Stal, 1873) | | 1 | Art | Taxom |
| Cantharidae Imhoff, 1856 | Franzosen | 3426 | Arten | Taxom |
| Canthyloscelidae Enderlein, 1912 | | 21 | Arten | Taxom |
| Capniidae Klapálek, 1905 | | 490 | Arten | Taxom |
| Capsidae (Hunt, 1979) | | 1 | Art | Taxom |
| Carabaidae | | 1 | Art | Taxom |
| Carabidae Latreille, 1802 | Laufkäfer | 47579 | Arten | Taxom |
| Carcinophoridae Hincks, 1954 | | 121 | Arten | Taxom |
| Caridae Thompson, 1992 | | 44 | Arten | Taxom |
| Carnidae Newman, 1834 | Gefiederfliegen | 115 | Arten | Taxom |
| Carposinidae Walsingham, 1907 | Fruchtwickler | 343 | Arten | Taxom |
| Carsidaridae Crawford, 1911 | | 45 | 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 |
| Ceratocombidae Fieber, 1861 | | 60 | Arten | Taxom |
| Ceratophyllidae Dampf, 1908 | | 574 | Arten | Taxom |
| Ceratopogonidae Newman, 1834 | Gnitzen | 6879 | Arten | Taxom |
| Cercopidae Leach, 1815 | Blutzikaden | 1927 | Arten | Taxom |
| Cercopionidae Hamilton, 1990 | | 2 | Arten | Taxom |
| Ceresopseidae Becker-Migdi..., 1958 | | 3 | Arten | Taxom |
| Cerococcidae Balachowsky, 1942 | | 136 | Arten | Taxom |
| Cerophytidae Latreille, 1834 | Dornhalskäfer | 31 | Arten | Taxom |
| Cerylonidae Billberg, 1820 | Glattrindenkäfer | 512 | Arten | Taxom |
| Cetoniidae (Leach, 1815) | Rosenkäfer | 6 | Arten | Taxom |
| Chaeteessidae Handlirsch, 1920 | | 16 | 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 |
| Chaulioditidae Handlirsch, 1908 | | 10 | Arten | Taxom |
| Cheliphlebidae Handlirsch, 1911 | | 4 | Arten | Taxom |
| Chelisochidae Burr, 1907 | | 32 | Arten | Taxom |
| Chelonariidae Blanchard, 1845 | | 216 | Arten | Taxom |
| Chiliocyclidae Evans, 1956 | | 4 | 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 |
| Chloroperlidae Okamoto, 1912 | | 275 | 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 |
| Chorotypidae Stål, 1873 | | 164 | Arten | Taxom |
| Chresmodidae Haase, 1890 | | 20 | Arten | Taxom |
| Chrysididae Latreille, 1802 | Goldwespen | 1682 | Arten | Taxom |
| Chrysomelidae Latreille, 1802 | Blattkäfer | 20946 | Arten | Taxom |
| Chrysopidae Schneider, 1851 | Florfliegen | 1380 | Arten | Taxom |
| Chrysoraphidiidae Liu, Ren, & ..., 2014 | | 1 | Art | Taxom |
| Chyromyidae Hendel, 1916 | Gelbfliegen | 149 | Arten | Taxom |
| Cicadellidae Latreille, 1802 | Kleinzikaden | 27808 | Arten | Taxom |
| Cicadidae Westwood, 1840 | Singzikaden | 4097 | Arten | Taxom |
| Cicadomorphidae Handlirsch, 1906 | | 4 | Arten | Taxom |
| Cicadopsyllidae Martynov, 1931 | | 1 | Art | Taxom |
| Ciidae Leach, 1819 | Baumschwammfresser | 749 | Arten | Taxom |
| Cimbicidae Kirby, 1837 | Keulenhornblattwespen | 161 | Arten | Taxom |
| Cimbrophlebiidae Willmann, 1977 | | 15 | Arten | Taxom |
| Cimicidae Latreille, 1802 | Bettwanzen | 182 | Arten | Taxom |
| Cixiidae Spinola, 1839 | Glasflügelzikaden | 2691 | Arten | Taxom |
| Cladochoristidae Tillyard, 1926 | | 5 | Arten | Taxom |
| Clambidae Fischer, 1821 | Punktkäfer | 183 | Arten | Taxom |
| Clastopteridae Stål, 1858 | | 105 | Arten | Taxom |
| Clathrotitanidae Riek, 1954 | | 3 | Arten | Taxom |
| Cleridae Latreille, 1802 | Buntkäfer | 1430 | Arten | Taxom |
| Clothodidae Tillyard, 1937 | | 18 | Arten | Taxom |
| Clusiidae Schönherr, 1840 | Druidenfliegen | 484 | Arten | Taxom |
| Cnemidolestidae Handlirsch, 1906 | | 12 | Arten | Taxom |
| Cneoglossidae Champion, 1897 | | 9 | Arten | Taxom |
| Cobaloblattidae Durden, 1969 | | 1 | Art | Taxom |
| Coccidae Stephens, 1829 | Napfschildläuse | 1783 | 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 |
| Coelostomidiidae Morrison, 1928 | | 2 | 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 |
| Coleoscytidae Martynov, 1935 | | 10 | Arten | Taxom |
| Colletidae Lepeletier, 1841 | Kropfbienen | 3035 | Arten | Taxom |
| Colobathristidae Stål, 1866 | | 84 | Arten | Taxom |
| Colymbotethidae Ponomarenko, 1993 | | 2 | Arten | Taxom |
| Compsocidae Mockford, 1967 | | 5 | Arten | Taxom |
| Conchaspididae Green, 1896 | | 31 | Arten | Taxom |
| Coniopterygidae Burmeister, 1839 | Staubhafte | 439 | Arten | Taxom |
| Conoesucidae Ross, 1967 | | 38 | Arten | Taxom |
| Conopidae Latreille, 1802 | Blasenkopffliegen | 993 | Arten | Taxom |
| Cooloolidae Rentz, 1980 | | 4 | 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 |
| Coreidae Leach, 1815 | Lederwanzen | 2906 | Arten | Taxom |
| Corethrellidae (Wood & Borkent, 1986) | | 1 | Art | Taxom |
| Corioxenidae Kinzelbach, 1970 | | 60 | Arten | Taxom |
| Corixidae Leach, 1815 | Ruderwanzen | 571 | Arten | Taxom |
| Corydalidae Burmeister, 1839 | | 205 | Arten | Taxom |
| Corydasialidae Wichard & al., 2005 | | 2 | Arten | Taxom |
| Corydiidae de Saussure, 1864 | Sandschaben | 307 | 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 |
| Cratomastotermitidae Engel, Grima..., 2009 | | 1 | Art | Taxom |
| Cratovitismidae Bechly, 2007 | | 9 | Arten | Taxom |
| Creaphididae Shcherbakov ..., 1991 | | 2 | Arten | Taxom |
| Cretamyzidae Heie, 1992 | | 1 | Art | Taxom |
| Cretohisteridae | | 1 | Art | Taxom |
| Cretomantidae Gratshev & Z..., 1994 | | 1 | Art | Taxom |
| Cretostylopidae Grimalid & K..., 2005 | | 1 | Art | Taxom |
| Crosaphididae Kovalev, 1983 | | 2 | Arten | Taxom |
| Crowsoniellidae Iablokoff-Kh..., 1983 | | 1 | Art | Taxom |
| Cryptocercidae Handlirsch, 1925 | | 13 | Arten | Taxom |
| Cryptochetidae Brues & Mela..., 1932 | | 36 | Arten | Taxom |
| Cryptococcidae | | 20 | Arten | Taxom |
| Cryptophagidae Kirby, 1937 | Schimmelkäfer | 695 | Arten | Taxom |
| Cryptorhamphidae Hamid, 1971 | | 4 | 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 |
| Curaliidae Schuh, Weira..., 2008 | | 1 | Art | Taxom |
| Curculionidae Latreille, 1802 | Rüsselkäfer | 63890 | Arten | Taxom |
| Curtonotidae Duda, 1934 | | 78 | Arten | Taxom |
| Curvicubitidae Hong, 1984 | | 1 | Art | Taxom |
| Cuterebridae (Blake, 1938) | | 1 | Art | Taxom |
| Cybocelphalidae | | 1 | Art | Taxom |
| Cycloristidae Martynova, 1958 | | 2 | Arten | Taxom |
| Cyclotornidae Meyrick, 1912 | | 5 | Arten | Taxom |
| Cydnidae Billberg, 1820 | Erdwanzen | 490 | Arten | Taxom |
| Cylindrachetidae Giglio-Tos, 1914 | | 19 | Arten | Taxom |
| Cylindrotomidae (Mulsant, 1842) | Moosmücken | 32 | Arten | Taxom |
| Cymbopsidae Kukalová, 1965 | | 1 | Art | Taxom |
| Cymenophlebiidae Pruvost, 1919 | | 1 | Art | Taxom |
| Cymidae Baerensprung, 1860 | | 79 | Arten | Taxom |
| Cynipidae Latreille, 1802 | Echte Gallwespen | 1610 | Arten | Taxom |
| Cypselosomatidae Hennig, 1958 | | 25 | Arten | Taxom |
| Cypselostomatidae | | 1 | Art | Taxom |
| Dactylopiidae Signoret, 1875 | | 56 | Arten | Taxom |
| Dalceridae Dyar, 1898 | | 40 | Arten | Taxom |
| Daldubidae Storozhenko, 1996 | | 3 | Arten | Taxom |
| Damasippoididae Zompro, 2004 | | 3 | Arten | Taxom |
| Danaidae (Boisduval, 1833) | | 54 | Arten | Taxom |
| Daohugoidae Rasnitsyn & ..., 2004 | | 1 | Art | Taxom |
| Dascillidae Guérin-Ménev..., 1843 | Moorweichkäfer | 94 | Arten | Taxom |
| Dasydemellidae | | 32 | Arten | Taxom |
| Decliniidae Nikitsky, La..., 1994 | | 2 | Arten | Taxom |
| Deinotitanidae Gorochov, 2011 | | 1 | Art | Taxom |
| Delopteridae Sellards, 1909 | | 1 | Art | Taxom |
| Delphacidae Leach, 1815 | Spornzikaden | 2937 | Arten | Taxom |
| Delpuenteblattidae Martins-Neto..., 2007 | | 3 | Arten | Taxom |
| Demopteridae Carpenter, 1950 | | 1 | Art | Taxom |
| Depressariidae Meyrick, 1883 | Flachleibmotten | 5 | Arten | Taxom |
| Derbidae Spinola, 1839 | | 1866 | Arten | Taxom |
| Dericorythidae Jacobson & B..., 1902 | | 175 | Arten | Taxom |
| Dermapteridae Vishniakova, 1980 | | 5 | Arten | Taxom |
| Dermelytridae Kukalová, 1966 | | 4 | Arten | Taxom |
| Dermestidae Hope, 1840 | Pelzkäfer | 1506 | Arten | Taxom |
| Dermopteridae | | 1 | Art | Taxom |
| Derodontidae LeConte, 1861 | Knopfkäfer | 45 | Arten | Taxom |
| Deuterophlebiidae Edwards, 1922 | Bergmücken | 14 | Arten | Taxom |
| Diadocidiidae Winnertz, 1863 | Schleimröhrenmücken | 6 | Arten | Taxom |
| Diamphipnoidae Ricker, 1950 | | 11 | Arten | Taxom |
| Diapheromeridae Rehn & Hebard, 1909 | | 1586 | Arten | Taxom |
| Diapriidae Latreille, 1796 | | 1492 | Arten | Taxom |
| Diaspididae Maskell, 1878 | Austernschildläuse | 3700 | Arten | Taxom |
| Diastatidae Hendel, 1917 | Laubstreufliegen | 62 | Arten | Taxom |
| Dictyodipteridae Rohdendorf, 1961 | | 1 | Art | Taxom |
| Dictyopharidae Spinola, 1839 | Laternenträger | 693 | Arten | Taxom |
| Diechoblattinidae Handlirsch, 1906 | | 4 | Arten | Taxom |
| Dilaridae Newman, 1853 | | 99 | Arten | Taxom |
| Dinidoridae Stål, 1867 | | 131 | Arten | Taxom |
| Dinoblattidae Durden, 1969 | | 5 | Arten | 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 |
| Diplatyidae (Verhoeff, 1902) | | 45 | Arten | Taxom |
| Diprionidae Rohwer, 1911 | Buschhornblattwespen | 101 | Arten | Taxom |
| Dipseudopsidae Ulmer, 1904 | | 124 | Arten | Taxom |
| Dipsocoridae Dohrn, 1859 | | 50 | Arten | Taxom |
| Dipteromantispidae Makarkin & al., 2013 | | 4 | Arten | Taxom |
| Discolomatidae Horn, 1878 | | 417 | Arten | Taxom |
| Ditomyiidae Keilin, 1919 | | 77 | Arten | Taxom |
| Dixidae Schiner, 1868 | Doppeladermücken | 287 | Arten | Taxom |
| Dolabellopsocidae Eertmoed, 1973 | | 31 | Arten | Taxom |
| Dolichopodidae Latreille, 1809 | Langbeinfliegen | 8974 | Arten | Taxom |
| Doubraviidae Aristov, 2015 | | 3 | Arten | Taxom |
| Douglasiidae Heinemann & ..., 1876 | Wippflügelfalter | 47 | Arten | Taxom |
| Dracaphididae Hong & al., 2009 | | 1 | Art | Taxom |
| Drepanidae Meyrick, 1895 | Eulenspinner | 724 | Arten | Taxom |
| Drepanochaitophoridae Zhang & Hong, 1999 | | 1 | Art | Taxom |
| Drepanosiphidae (Herrich-Scha..., 1857) | | 5 | 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 |
| Dunstaniidae Tillyard, 1916 | | 12 | Arten | Taxom |
| Dynastidae (MacLeay, 1819) | Riesenkäfer | 2 | Arten | Taxom |
| Dysmorphoptilidae Handlirsch, 1906 | | 23 | Arten | Taxom |
| Dysoneuridae Sukatsheva, 1968 | | 6 | Arten | Taxom |
| Dytiscidae Leach, 1815 | Echte Schwimmkäfer | 5827 | Arten | Taxom |
| Dzhajloutshellidae Gorochov, 1994 | | 5 | Arten | Taxom |
| Eadiidae Vršanský, 2009 | | 1 | Art | Taxom |
| Ebboidae Perrichot, N..., 2006 | | 1 | Art | Taxom |
| Echinophthiriidae Enderlein, 1904 | | 14 | Arten | Taxom |
| Ecnomidae Ulmer, 1903 | | 528 | Arten | Taxom |
| Ectobiidae (Brunner von ..., 1865) | Waldschaben | 533 | Arten | Taxom |
| Ectopsocidae | | 205 | Arten | Taxom |
| Elachistidae Bruand, 1851 | Grasminierfalter | 3257 | Arten | Taxom |
| Elasmodemidae (Letheirry & ..., 1896) | | 2 | Arten | Taxom |
| Elateridae Leach, 1815 | Larven: Echte Drahtwürmer | 12661 | Arten | Taxom |
| Elcanidae Handlirsch, 1906 | | 129 | Arten | Taxom |
| Electralbertidae Botosaneanu ..., 1983 | | 1 | Art | Taxom |
| Electrentomidae Enderlein, 1911 | | 18 | Arten | Taxom |
| Electrococcidae Koteja, 2000 | | 4 | Arten | Taxom |
| Electrotomidae Rasnitsyn, 1977 | | 1 | Art | Taxom |
| Elektraphididae Steffan, 1968 | | 14 | Arten | Taxom |
| Elenchidae Perkins, 1905 | | 43 | Arten | Taxom |
| Elipsocidae Pearman, 1936 | | 172 | Arten | Taxom |
| Elliidae Krzeminska, ..., 1993 | | 4 | Arten | Taxom |
| Ellinaphididae Kania & Wegi..., 2008 | | 28 | Arten | Taxom |
| Elmidae Curtis, 1830 | Hakenkäfer | 1944 | Arten | Taxom |
| Elodophthalmidae Kirejtshuk &..., 2008 | | 2 | Arten | Taxom |
| Elytroneuridae Carpenter, 1933 | | 1 | Art | Taxom |
| Embiidae Burmeister, 1839 | | 99 | Arten | Taxom |
| Embolemidae Förster, 1856 | Widderkopfwespen | 35 | Arten | Taxom |
| Embonychidae Navas, 1917 | | 1 | Art | Taxom |
| Empheriidae Enderlein, 1906 | | 7 | Arten | Taxom |
| Emphylopteridae Handlirsch, 1922 | | 1 | Art | Taxom |
| Empididae Latreille, 1809 | Tanzfliegen | 3851 | Arten | Taxom |
| Empusidae Burmeister, 1838 | | 24 | Arten | Taxom |
| Encyrtidae Walker, 1837 | | 4454 | Arten | Taxom |
| Enderleinellidae Ewing, 1929 | | 55 | Arten | Taxom |
| Endomychidae Leach, 1815 | Stäublingskäfer | 1546 | Arten | Taxom |
| Endromidae Boisduval, 1828 | Birkenspinner | 1 | Art | Taxom |
| Eneopteridae (Saussure, 1893) | | 456 | Arten | Taxom |
| Englathaumatidae Novokshonov ..., 2016 | | 2 | Arten | Taxom |
| Enicocephalidae Stål, 1860 | | 349 | Arten | Taxom |
| Ensiferoblattidae Li and Huang, 2023 | | 1 | Art | Taxom |
| Ensiferophasmatidae Zompro, 2005 | | 1 | Art | Taxom |
| Eoblattidae Handlirsch, 1906 | | 3 | Arten | Taxom |
| Eocoronidae Tindale, 1981 | | 1 | Art | Taxom |
| Eoditomyiidae Ansorge, 1996 | | 1 | Art | Taxom |
| Eoichneumonidae (Jell & Duncan, 1986) | | 16 | Arten | Taxom |
| Eolepidopterigidae Rasnitsyn, 1983 | | 14 | Arten | Taxom |
| Eolocustopsidae Riek, 1976 | | 1 | Art | 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 |
| Eoscartarellidae | | 1 | Art | Taxom |
| Eoscarterellidae Evans, 1956 | | 4 | 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 |
| Epideigmatidae Handlirsch, 1911 | | 10 | Arten | Taxom |
| Epigambriidae Handlirsch, 1939 | | 1 | Art | Taxom |
| Epipsocidae | | 159 | Arten | Taxom |
| Epipygidae Hamilton, 2001 | | 5 | Arten | Taxom |
| Epipyropidae Dyar, 1903 | | 30 | Arten | Taxom |
| Episactidae Burr, 1899 | | 68 | Arten | Taxom |
| Erebidae Leach, 1815 | | 25585 | Arten | Taxom |
| Eremazidae Iablokoff-Kh..., 1977 | | 3 | Arten | Taxom |
| Eremiaphilidae Wood-Mason, 1889 | | 79 | Arten | Taxom |
| Eremochaetidae Ussatchov, 1968 | | 23 | Arten | Taxom |
| Eriococcidae Cockerell, 1899 | Wollschildläuse | 1164 | Arten | Taxom |
| Eriocottidae Spuler, 1898 | | 100 | Arten | Taxom |
| Eriocraniidae Rebel, 1901 | Trugfalter | 51 | Arten | Taxom |
| Eriosomatidae | | 1 | Art | Taxom |
| Erotylidae Latreille, 1802 | Faulholzkäfer | 599 | Arten | Taxom |
| Ethmiidae (Busck, 1909) | | 1 | Art | Taxom |
| Eucaenidae Handlirsch, 1906 | | 5 | Arten | Taxom |
| Eucharitidae Latreille, 1809 | | 427 | Arten | Taxom |
| Euchauliodidae Riek, 1974 | | 1 | Art | 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 |
| Eumastacidae Burr, 1898 | | 273 | Arten | Taxom |
| Eumenidae (Leach, 1815) | Lehmwespen | 2 | Arten | Taxom |
| Eupelmidae Walker, 1833 | | 1035 | Arten | Taxom |
| Eupterotidae Swinhoe, 1892 | | 556 | Arten | Taxom |
| Euremiscidae Zalesskii, 1951 | | 1 | Art | Taxom |
| Eurybrachidae Stål, 1862 | | 215 | Arten | Taxom |
| Euryptilonidae Martynov, 1940 | | 20 | Arten | Taxom |
| Eurytomidae Walker, 1832 | | 1611 | Arten | Taxom |
| Euschmidtiidae Rehn, 1948 | | 241 | Arten | Taxom |
| Eustheniidae Tillyard, 1921 | | 25 | Arten | Taxom |
| Euteliidae Grote, 1882 | | 608 | Arten | Taxom |
| Euthygrammatidae Martynov, 1928 | | 1 | Art | Taxom |
| Euxenoperlidae Riek, 1976 | | 5 | Arten | Taxom |
| Evaniidae Latreille, 1802 | Hungerwespen | 520 | Arten | Taxom |
| Evenkidae Rasnitsyn, 1983 | | 1 | Art | 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 |
| Fauriellidae Priesner, 1949 | | 1 | Art | Taxom |
| Fergusoninidae Hennig, 1958 | | 42 | Arten | Taxom |
| Figitidae Thomson, 1862 | | 1208 | Arten | Taxom |
| Flatidae Spinola, 1839 | Schmetterlingszikaden | 1273 | Arten | Taxom |
| Forficulidae Stephens, 1829 | Eigentliche Ohrwürmer | 289 | Arten | Taxom |
| Formicidae Latreille, 1809 | Ameisen | 19027 | Arten | Taxom |
| Fractaliidae Vrsansky and..., 2021 | | 1 | Art | Taxom |
| Fulgoridae Latreille, 1807 | Leuchtzirpen | 764 | Arten | Taxom |
| Fulgoridiidae Handlirsch, 1939 | | 152 | Arten | Taxom |
| Fulgorinidae Durden, 1969 | | 2 | Arten | Taxom |
| Fungivoritidae Rohdendorf, 1957 | | 13 | Arten | Taxom |
| Fuziidae Vršanský, Li..., 2009 | | 6 | Arten | Taxom |
| Galacticidae Minet, 1986 | | 27 | Arten | Taxom |
| Galgulidae | | 1 | Art | Taxom |
| Gallophasmatidae Nel & al., 2010 | | 1 | Art | Taxom |
| Gasteruptiidae Ashmead, 1900 | Gichtwespen | 306 | Arten | Taxom |
| Geinitziidae Handlirsch, 1906 | | 16 | Arten | Taxom |
| Gelasopteridae Carpenter, 1976 | | 1 | Art | Taxom |
| Gelastocoridae Kirkaldy, 1897 | | 127 | Arten | Taxom |
| Gelechiidae Stainton, 1854 | Palpenfalter | 6732 | Arten | Taxom |
| Genaphididae Handlirsch, 1907 | | 4 | Arten | Taxom |
| Gengidae Fennah, 1949 | | 2 | Arten | Taxom |
| Geocoridae Baerensprung, 1860 | | 302 | Arten | Taxom |
| Geometridae Leach, 1815 | Spanner | 24844 | Arten | Taxom |
| Georyssidae Laporte, 1819 | | 3 | Arten | Taxom |
| Geotrupidae Latreille, 1802 | Blatthornkäfer | 1403 | Arten | Taxom |
| Gerapompidae Handlirsch, 1906 | | 7 | Arten | Taxom |
| Geraridae Scudder, 1885 | | 24 | Arten | Taxom |
| Gerocynipidae Kovalev, 1994 | | 5 | Arten | Taxom |
| Gerridae Leach, 1815 | Schneider | 955 | 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 |
| Grammolingiidae Ren, 2002 | | 29 | Arten | Taxom |
| Grammostylidae Panfilov, 1980 | | 1 | Art | Taxom |
| Granulidae Hong, 1980 | | 1 | Art | Taxom |
| Grassyaphididae Heie, 2000 | | 1 | Art | Taxom |
| Grauvogeliidae Krzeminski, 1994 | | 6 | Arten | Taxom |
| Grimaldiellidae Koteja, 2000 | | 2 | Arten | Taxom |
| Gripopterygidae Enderlein, 1909 | | 369 | Arten | Taxom |
| Grohnidae Koteja, 2008 | | 1 | Art | Taxom |
| Gryllacrididae Blanchard, 1845 | | 955 | Arten | Taxom |
| Gryllavidae Gorochov, 1986 | | 4 | Arten | Taxom |
| Gryllidae Bolivar, 1878 | Grillen | 2040 | Arten | Taxom |
| Grylloblattidae E. M. Walker, 1914 | Grillenschaben | 38 | Arten | Taxom |
| Gryllomantidae Gorochov, 2006 | | 1 | Art | Taxom |
| Gryllotalpidae Saussure, 1870 | Maulwurfsgrillen | 162 | Arten | Taxom |
| Gulouidae (Béthoux, Cui..., 2011) | | 1 | Art | Taxom |
| Gyponidae | | 1 | Art | Taxom |
| Gyrinidae Latreille, 1802 | Drehkäfer | 634 | Arten | Taxom |
| Gyroblattidae Durden, 1969 | | 7 | Arten | Taxom |
| Gyropidae Kellogg, 1896 | | 97 | Arten | Taxom |
| Hadentomidae Handlirsch, 1906 | | 3 | Arten | Taxom |
| Hadrocoridae Handlirsch, 1920 | | 1 | Art | Taxom |
| Haematopinidae Enderlein, 1904 | Tierläuse | 33 | Arten | Taxom |
| Haglidae Handlirsch, 1906 | | 109 | Arten | Taxom |
| Hagloedischiidae Gorochov, 1986 | | 2 | Arten | Taxom |
| Haglotettigoniidae Gorochov, 1988 | | 2 | Arten | Taxom |
| Halictidae Thomson, 1869 | Schmalbienen und Furchenbienen | 6482 | Arten | Taxom |
| Halictophagidae Perkins, 1905 | | 176 | Arten | Taxom |
| Halimococcidae Brown & McKe..., 1962 | | 27 | Arten | Taxom |
| Haliplidae Aubé, 1836 | Wassertreter | 298 | Arten | Taxom |
| Hammanococcidae Koteja & Azar, 2008 | | 1 | Art | Taxom |
| Hamophthiriidae Johnson, 1969 | | 1 | Art | Taxom |
| Hapalopteridae Handlirsch, 1906 | | 19 | Arten | Taxom |
| Havlatiidae Kukalová, 1964 | | 2 | Arten | Taxom |
| Hebeigrammidae Hong, 2003 | | 1 | Art | Taxom |
| Hebridae Amyot and Se..., 1843 | Uferläufer | 255 | 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 |
| Helotrephidae Esaki & China, 1927 | | 194 | Arten | Taxom |
| Hemerobiidae Latreille, 1802 | Blattlauslöwen | 638 | Arten | Taxom |
| Hemimeridae Sharp, 1895 | | 7 | Arten | Taxom |
| Hemimylacridae Waterlot, 1934 | | 18 | Arten | Taxom |
| Hemipsocidae Pearman, 1936 | | 27 | Arten | Taxom |
| Henicocoridae Woodward, 1968 | | 1 | Art | Taxom |
| Hennigmatidae Shcherbakov, 1995 | | 4 | Arten | Taxom |
| Hepialidae Stephens, 1829 | Wurzelbohrer | 844 | Arten | Taxom |
| Heptapsogasteridae (Carriker, 1936) | | 7 | Arten | Taxom |
| Herdinidae Carpenter & ..., 1972 | | 1 | Art | Taxom |
| Hermatobatidae Coutière and..., 1901 | | 13 | 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 |
| Heterogastridae Stål, 1872 | | 105 | Arten | Taxom |
| Heterogynidae Rambur, 1866 | Federwidderchen | 10 | Arten | Taxom |
| Heteromyzidae Fallen, 1820 | Scheufliegen | 79 | Arten | Taxom |
| Heteronemiidae Rehn, J. A. G., 1904 | | 89 | Arten | Taxom |
| Heteropterygidae Kirby, 1896 | | 168 | Arten | Taxom |
| Heteroptilidae Carpenter, 1977 | | 1 | Art | Taxom |
| Heterothripidae Bagnall, 1912 | | 76 | Arten | Taxom |
| Hilarimorphidae Hendel, 1936 | Auenfliegen | 37 | Arten | Taxom |
| Himantopteridae Rogenhofer, 1884 | | 105 | Arten | Taxom |
| Hippoboscidae Samouelle, 1819 | Lausfliegen | 759 | Arten | Taxom |
| Hispanocaderidae Golub, Popov..., 2012 | | 1 | Art | Taxom |
| Histeridae Gyllenhal, 1808 | Stutzkäfer | 6368 | Arten | Taxom |
| Hodgsonicoccidae Vea & Grimaldi, 2015 | | 1 | Art | Taxom |
| Hodotermitidae Desneux, 1904 | | 30 | 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 |
| Homoeodictyidae Martynov, 1937 | | 1 | Art | Taxom |
| Homotomidae Heslop-Harrison, 1958 | | 80 | Arten | Taxom |
| Hoplopleuridae Ewing, 1929 | | 198 | Arten | Taxom |
| Hoploridiidae Popov & Shch..., 1991 | | 1 | Art | Taxom |
| Hormaphidae | | 4 | Arten | Taxom |
| Huaxiasciaritidae (Hong, 2002) | | 28 | Arten | Taxom |
| Huttoninidae (Steyskal, 1965) | | 8 | Arten | Taxom |
| Hyblaeidae Hampson, 1903 | | 33 | Arten | Taxom |
| Hybophthiridae Ewing, 1929 | | 1 | Art | 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 |
| Hydrometridae Billberg, 1820 | Teichläufer | 175 | Arten | 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 |
| Hylicellidae Evans, 1956 | | 40 | Arten | Taxom |
| Hymenopodidae Giglio-Tos, 1919 | | 320 | Arten | Taxom |
| Hyocephalidae Bergroth, 1906 | | 3 | Arten | Taxom |
| Hyperpolyneuridae Rohdendorf, 1961 | | 1 | Art | Taxom |
| Hypochthonellidae China and Fe..., 1952 | | 1 | Art | Taxom |
| Hypsipterygidae Drake, 1961 | | 5 | Arten | 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 |
| Idelinellidae Storozhenko, 1997 | | 8 | Arten | Taxom |
| Idiomylacridae Handlirsch, 1906 | | 1 | Art | Taxom |
| Idiostolidae Scudder, 1962 | | 5 | Arten | Taxom |
| Ignotalidae Riek, 1973 | | 5 | Arten | Taxom |
| Ignotingidae Zhang, Golub..., 2005 | | 1 | Art | Taxom |
| Immidae Heppner, 1977 | | 164 | Arten | Taxom |
| Inbiomyiidae Buck, 2006 | | 11 | Arten | Taxom |
| Incurvariidae Spuler, 1898 | Echte Blattsackfalter | 80 | Arten | Taxom |
| Indotermitidae (Roonwal, 1958) | | 10 | Arten | Taxom |
| Ingruidae Becker-Migdi..., 1960 | | 9 | Arten | Taxom |
| Inkaidae Koteja, 1989 | | 1 | Art | Taxom |
| Inocelliidae Navas, 1913 | | 21 | Arten | Taxom |
| Ipsviciidae Tillyard, 1919 | | 18 | Arten | Taxom |
| Iridopterygidae Giglio-Tos, 1919 | | 136 | Arten | Taxom |
| Ironomyiidae McAlpine & M..., 1966 | | 26 | Arten | Taxom |
| Ischnoneuridae Handlirsch, 1906 | | 9 | Arten | Taxom |
| Ischnopsyllidae Wahlgren, 1907 | Fledermausflöhe | 132 | Arten | Taxom |
| Isolitaphidae Poinar, 2017 | | 1 | Art | Taxom |
| Isolitaphididae | | 2 | Arten | Taxom |
| Issidae Spinola, 1839 | Käferzikaden | 1262 | Arten | Taxom |
| Ithonidae Newman, 1838 | | 25 | Arten | Taxom |
| Ithyceridae (Schönherr, 1826) | | 6 | Arten | Taxom |
| Ivapteridae Aristov, 2009 | | 1 | Art | Taxom |
| Jacobsoniidae Heller, 1926 | | 29 | Arten | Taxom |
| Jantarimantidae Vrsansky, 2002 | | 1 | Art | Taxom |
| Jascopidae Hamilton, 1971 | | 11 | Arten | Taxom |
| Jassidae Latreille, 1802 | | 6 | Arten | Taxom |
| Jersicoccidae Koteja, 2000 | | 4 | Arten | Taxom |
| Jezzinothripidae zur Strassen, 1973 | | 2 | Arten | Taxom |
| Joppeicidae Reuter, 1910 | | 1 | Art | Taxom |
| Juramantidae Vrsansky, 2002 | | 1 | Art | Taxom |
| Juraperlidae Huang & Nel, 2007 | | 2 | Arten | Taxom |
| Juraphididae Zyla & al., 2014 | | 2 | Arten | Taxom |
| Jurapriidae Rasnitsyn, 1983 | | 2 | Arten | Taxom |
| Jurodidae Ponomarenko, 1985 | | 6 | Arten | Taxom |
| Juroraphidiidae Liu, Ren, & ..., 2014 | | 1 | Art | Taxom |
| Kalligrammatidae Handlirsch, 1906 | | 69 | Arten | Taxom |
| Kalophryganeidae Haupt, 1956 | | 1 | Art | Taxom |
| Kalotermitidae Froggatt, 1897 | Trockenholztermiten | 532 | Arten | Taxom |
| Kaltanidae Martynova, 1958 | | 39 | Arten | Taxom |
| Karabasiidae Popov, 1985 | | 9 | Arten | Taxom |
| Karatavitidae Rasnitsyn, 1963 | | 21 | Arten | Taxom |
| Kargalopteridae Aristov, 2009 | | 1 | Art | Taxom |
| Kateretidae Kirkby, 1837 | Riedgras-Glanzkäfer | 30 | Arten | Taxom |
| Katerinkidae Prokop & Nel, 2007 | | 1 | Art | Taxom |
| Kermesidae Signoret, 1875 | Eichennapfläuse | 110 | Arten | Taxom |
| Keroplatidae Rondani, 1856 | Langhornmücken | 1280 | Arten | Taxom |
| Kerriidae Lindinger, 1937 | | 36 | Arten | Taxom |
| Khatangaphididae Heie, 2000 | | 2 | Arten | Taxom |
| Khutelchalcididae Rasnitsyn & al., 2004 | | 2 | Arten | Taxom |
| Kinnaridae Muir, 1925 | | 109 | Arten | Taxom |
| Kinzelbachillidae Pohl & Beutel, 2016 | | 1 | Art | Taxom |
| Kliveriidae Handlirsch, 1919 | | 1 | Art | Taxom |
| Kobdocoridae Popov, 1986 | | 2 | Arten | Taxom |
| Kokiriidae McFarlane, 1964 | | 10 | Arten | Taxom |
| Kortshakoliidae Storozhenko, 1997 | | 2 | Arten | Taxom |
| Kovalevisargidae Mostovski, 1997 | | 6 | Arten | Taxom |
| Kozariidae Vea & Grimaldi, 2015 | | 2 | Arten | Taxom |
| Krausichnidae Genise, 2004 | | 4 | Arten | Taxom |
| Kuafuidae Rasnitsyn & ..., 2010 | | 1 | Art | Taxom |
| Kukaspididae Koteja & Poinar, 2001 | | 1 | Art | Taxom |
| Kuwaniidae MacGillvray, 1921 | | 11 | Arten | Taxom |
| Labidelytridae Kukalova-Peck, 1987 | | 1 | Art | Taxom |
| Labiduridae Verhoeff, 1902 | | 46 | Arten | Taxom |
| Labiidae (Burr, 1909) | | 170 | Arten | Taxom |
| Labiococcidae Koteja, 2000 | | 2 | Arten | Taxom |
| Labradorocoleidae Ponomarenko, 1969 | | 1 | Art | Taxom |
| Lachesillidae Pearman, 1936 | | 379 | Arten | Taxom |
| Lacturidae Heppner, 1995 | | 52 | Arten | Taxom |
| Laemobothriidae Mjöberg, 1910 | | 29 | Arten | Taxom |
| Laemophloeidae (Ganglbauer, 1899) | Bastplattkäfer | 46 | Arten | Taxom |
| Lagriidae (Latreille, 1825) | Wollkäfer | 1 | Art | Taxom |
| Lalacidae Hamilton, 1990 | | 20 | Arten | Taxom |
| Lamingtoniidae Gupta & Crowson, 1969 | | 3 | Arten | Taxom |
| Lampyridae Latreille, 1817 | Glühwürmchen | 3262 | Arten | Taxom |
| Languriidae (Latreille, 1802) | Getreidekäfer | 1 | Art | Taxom |
| Largidae Amyot and Se..., 1843 | | 323 | Arten | Taxom |
| Lasiocampidae Harris, 1841 | Glucken | 2176 | Arten | Taxom |
| Lasiosynidae Kirejtshuk, ..., 2010 | | 52 | Arten | Taxom |
| Lathiceridae Dirsh, 1954 | | 4 | Arten | Taxom |
| Latridiidae Erichson, 1842 | Moderkäfer | 751 | Arten | Taxom |
| Lauxaniidae Macquart, 1835 | Faulfliegen | 2196 | Arten | Taxom |
| Lebanaphididae Heie, 2000 | | 2 | Arten | Taxom |
| Lebanococcidae Koteja & Azar, 2008 | | 1 | Art | Taxom |
| Lecaniodiaspididae | | 2 | Arten | Taxom |
| Lecanodiaspididae Borchsenius, 1965 | | 96 | Arten | Taxom |
| Lecithoceridae Le Marchand, 1947 | | 1067 | Arten | Taxom |
| Leiodidae Fleming, 1821 | Schwammkugelkäfer | 4802 | Arten | Taxom |
| Lemmatophoridae Sellards, 1909 | | 28 | Arten | Taxom |
| Lemoniidae Hampson, 1918 | Herbstspinner | 25 | Arten | Taxom |
| Lentulidae Dirsh, 1956 | | 189 | Arten | Taxom |
| Lepiceridae Hinton, 1936 | | 7 | Arten | Taxom |
| Lepidopsocidae Lienhard & S..., 2002 | | 225 | Arten | Taxom |
| Lepidostomatidae Ulmer, 1903 | | 822 | Arten | Taxom |
| Leptaphelocheiridae Polhemus, 2000 | | 1 | Art | Taxom |
| Leptidae | | 0 | Arten | Taxom |
| Leptoceridae Leach, 1815 | | 2588 | Arten | Taxom |
| Leptopodidae Amyot and Se..., 1843 | Steinläuferwanzen | 52 | Arten | Taxom |
| Leptopsyllidae Rothschild &..., 1915 | | 218 | Arten | Taxom |
| Lestoniidae China, 1955 | | 2 | Arten | Taxom |
| Leucospidae Fabricius, 1775 | Falten-Erzwespen | 161 | Arten | Taxom |
| Leuctridae Klapálek, 1905 | | 446 | Arten | Taxom |
| Liadopsyllidae Martynov, 1927 | | 13 | Arten | Taxom |
| Liadytidae Ponomarenko, 1977 | | 8 | Arten | Taxom |
| Liassophilidae Tillyard, 1933 | | 6 | Arten | Taxom |
| Liberiblattinidae Vrsansky, 2002 | | 23 | Arten | Taxom |
| Ligavenidae Hamilton, 1992 | | 1 | Art | 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 |
| Linognathidae Webb, 1946 | | 78 | Arten | Taxom |
| Liomopteridae Sellards, 1909 | | 83 | Arten | Taxom |
| Liopteridae Ashmead, 1895 | | 95 | Arten | Taxom |
| Liposcelididae Enderlein, 1911 | Bücherläuse | 224 | Arten | Taxom |
| Lithidiidae Dirsh, 1961 | | 33 | Arten | Taxom |
| Lithopanorpidae Carpenter, 1930 | | 2 | Arten | Taxom |
| Lithoscarabaeidae Nikolajev, 1992 | | 3 | Arten | Taxom |
| Lithuanicoccidae Koteja, 2008 | | 2 | Arten | Taxom |
| Liturgusidae Giglio-Tos, 1919 | | 93 | Arten | Taxom |
| Liviidae Low, 1879 | | 377 | Arten | Taxom |
| Locustavidae Sharov, 1968 | | 16 | Arten | Taxom |
| Locustidae (Kirby, 1825) | | 3 | Arten | Taxom |
| Locustopsidae Handlirsch, 1906 | | 80 | Arten | Taxom |
| Lonchaeidae Loew, 1861 | Lanzenfliegen | 615 | Arten | Taxom |
| Lonchodidae | | 49 | Arten | Taxom |
| Lonchopteridae Curtis, 1839 | Lanzenfliegen | 74 | Arten | Taxom |
| Lophioneuridae Tillyard, 1921 | | 39 | Arten | Taxom |
| Lophocoronidae Common, 1973 | | 7 | Arten | Taxom |
| Lophopidae Stål, 1866 | | 144 | Arten | Taxom |
| Luanpingitidae Zhang, 1986 | | 1 | Art | Taxom |
| Lucanidae Latreille, 1804 | Hirschkäfer | 2906 | Arten | Taxom |
| Lutevanaphididae Szwedo, Lape..., 2014 | | 1 | Art | 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 |
| Lygaeidae Schilling, 1829 | Bodenwanzen | 1647 | Arten | Taxom |
| Lygistorrhinidae Hendel, 1936 | | 24 | Arten | Taxom |
| Lygobiidae Mitchell, 1908 | | 1 | Art | 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 |
| Machaerotidae Stål, 1866 | | 128 | Arten | Taxom |
| Macrodrilidae Poinar, 2020 | | 1 | Art | Taxom |
| Macropsyllidae Oudemans, 1909 | | 3 | Arten | Taxom |
| Macroveliidae McKinstry, 1942 | | 5 | Arten | Taxom |
| Madygenophlebiidae Storozhenko, 1992 | | 4 | Arten | Taxom |
| Magnacicadiidae Hong & Chen, 1981 | | 3 | Arten | Taxom |
| Magnocoleidae Hong, 1998 | | 1 | Art | Taxom |
| Maguviopseidae Shcherbakov, 2011 | | 12 | Arten | Taxom |
| Maimetshidae (Rasnitsyn, 1975) | | 20 | Arten | Taxom |
| Malacopsyllidae Baker, 1905 | | 2 | Arten | Taxom |
| Malcidae Stål, 1865 | | 50 | Arten | Taxom |
| Malgasiidae (Gorochov, 1984) | | 15 | Arten | Taxom |
| Malmopsyllidae Becker-Migdi..., 1985 | | 1 | Art | Taxom |
| Mancusoblattidae Martins-Neto..., 2005 | | 8 | Arten | Taxom |
| Manicapsocidae (Mockford, 1967) | | 2 | Arten | Taxom |
| Manipulatoridae Vrsansky & B..., 2015 | | 2 | Arten | Taxom |
| Mantidae Burmeister, 1838 | Fangschrecken | 1311 | Arten | Taxom |
| Mantispidae Leach, 1815 | Fanghafte | 540 | Arten | Taxom |
| Mantoblattidae Gorochov, 2006 | | 1 | Art | Taxom |
| Mantoididae Giglio-Tos, 1927 | | 12 | Arten | Taxom |
| Mantophasmatidae Zompro, Kla..., 2002 | Gladiatoren | 37 | Arten | Taxom |
| Marchalinidae Morrison, 1927 | | 2 | Arten | Taxom |
| Margarodidae Newstead, 1901 | Höhlenschildläuse | 139 | Arten | Taxom |
| Marginidae Mcalpine, 1991 | | 3 | Arten | Taxom |
| Mastacideidae Rehn, 1948 | | 8 | Arten | Taxom |
| Mastotermitidae Desneux, 1904 | Riesentermiten | 28 | Arten | Taxom |
| Matsucoccidae Morrison, 1927 | Kiefernborkenschildläuse | 47 | Arten | Taxom |
| Mauroniscidae Majer, 1995 | | 27 | Arten | Taxom |
| Medocostidae Stys, 1967 | | 2 | Arten | Taxom |
| Meenoplidae Fieber, 1872 | | 141 | Arten | Taxom |
| Megachilidae Schenk, 1860 | Bauchsammlerbienen | 5468 | Arten | Taxom |
| Megagnathidae Tillyard, 1918 | | 1 | Art | Taxom |
| Megakhosaridae Sharov, 1961 | | 18 | 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 |
| Megarididae McAtee & Mal..., 1928 | | 8 | Arten | Taxom |
| Megaspilidae Ashmead, 1893 | | 304 | Arten | Taxom |
| Megelytridae Carpenter, 1933 | | 1 | Art | Taxom |
| Melandryidae Leach, 1815 | Düsterkäfer | 496 | Arten | Taxom |
| Melanthripidae Bagnall, 1913 | | 62 | Arten | Taxom |
| Melinophlebiidae Durden, 1969 | | 2 | 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 |
| Membracidae Germar, 1821 | Buckelzikaden | 3498 | Arten | Taxom |
| Mendozachoristidae Brauckmann &..., 2010 | | 1 | Art | Taxom |
| Mengeidae Pierce, 1908 | | 2 | Arten | Taxom |
| Mengenillidae Kinzelbach, 1970 | | 26 | Arten | Taxom |
| Menoponidae Mjöberg, 1910 | | 999 | Arten | Taxom |
| Meropeidae Espen-Petersen, 1921 | | 6 | Arten | Taxom |
| Merothripidae Hood, 1914 | | 21 | Arten | Taxom |
| Meruidae Spangler & S..., 2005 | | 1 | Art | Taxom |
| Meschiidae Malipatil, 2014 | | 2 | Arten | Taxom |
| Mesoberothidae Carpenter, 1991 | | 2 | Arten | Taxom |
| Mesoblattinidae Handlirsch, 1906 | | 186 | Arten | Taxom |
| Mesochrysopidae Handlirsch, 1906 | | 46 | Arten | Taxom |
| Mesocinetidae Kirejtshuk &..., 2010 | | 4 | Arten | Taxom |
| Mesoedischiidae Gorochov, 1987 | | 4 | Arten | Taxom |
| Mesogereonidae Tillyard, 1921 | | 7 | Arten | Taxom |
| Mesojabloniidae Storozhenko, 1992 | | 3 | Arten | Taxom |
| Mesokristenseniidae Huang, Nel &..., 2010 | | 8 | Arten | Taxom |
| Mesoleuctridae Sinitshenkova, 1982 | | 9 | Arten | Taxom |
| Mesolygaeidae Zhang, 1991 | | 2 | Arten | Taxom |
| Mesopentacoridae Popov, 1968 | | 4 | Arten | Taxom |
| Mesophantasmatidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Mesopolystoechotidae Martynova, 1949 | | 1 | Art | Taxom |
| Mesopsocidae Enderlein, 1903 | | 84 | Arten | Taxom |
| Mesopsychidae Tillyard, 1917 | | 87 | Arten | Taxom |
| Mesoraphidiidae Martynov, 1925 | | 81 | Arten | Taxom |
| Mesorthopteridae Tillyard, 1922 | | 28 | Arten | Taxom |
| Mesosciophilidae Rohdendorf, 1946 | | 21 | Arten | Taxom |
| Mesoserphidae Kozlov, 1970 | | 34 | Arten | Taxom |
| Mesotitanidae Tillyard, 1925 | | 20 | Arten | Taxom |
| Mesotrephidae Popov, 1971 | | 1 | Art | Taxom |
| Mesoveliidae Douglas and ..., 1867 | Hüftwasserläufer | 78 | Arten | Taxom |
| Mesozoicaphididae Heie, 1992 | | 7 | Arten | Taxom |
| Metallyticidae Handlirsch, 1925 | | 6 | Arten | Taxom |
| Metarbelidae (Strand, 1909) | | 36 | Arten | Taxom |
| Methochidae | | 1 | Art | Taxom |
| Metropatoridae Handlirsch, 1906 | | 2 | Arten | Taxom |
| Micrococcidae Silvestri, 1939 | | 10 | Arten | Taxom |
| Micromalthidae Barber, 1913 | | 6 | Arten | Taxom |
| Micronectidae Jaczewski, 1924 | | 236 | Arten | Taxom |
| Micronoctuidae Fibiger, 2005 | | 114 | Arten | Taxom |
| Micropalentomidae Schmidt, 1962 | | 2 | Arten | Taxom |
| Micropezidae Illiger, 1798 | Stelzenfliegen | 665 | Arten | Taxom |
| Microphoridae (Chvala, 1983) | Kleine Tanzfliegen | 1 | Art | Taxom |
| Microphysidae Dohrn, 1859 | Flechtenwanzen | 49 | Arten | Taxom |
| Micropterigidae Herrich-Schä..., 1855 | Urmotten | 191 | Arten | Taxom |
| Microthoraciidae Kim and Ludwig, 1978 | | 4 | Arten | Taxom |
| Milichiidae Schiner, 1862 | Nistfliegen | 405 | Arten | Taxom |
| Millieriidae (Stainton, 1854) | | 2 | Arten | Taxom |
| Mimallonidae Burmeister, 1878 | | 201 | Arten | Taxom |
| Mimarachnidae Shcherbakov, 2007 | | 5 | Arten | Taxom |
| Miridae Hahn, 1831 | Blindwanzen | 12462 | Arten | Taxom |
| Mirinidae (Kozlov, 1985) | | 2 | Arten | Taxom |
| Mirolydidae Wang, Rasnit..., 2017 | | 1 | Art | Taxom |
| Mnesarchaeidae Eyer, 1924 | | 19 | Arten | Taxom |
| Mogoplistidae Saussure, 1877 | | 400 | Arten | Taxom |
| Molannidae Wallengren, 1891 | | 25 | Arten | Taxom |
| Momphidae Herrich Scha..., 1857 | Fransenmotten | 2 | Arten | Taxom |
| Monomachidae Ashmead, 1902 | | 28 | Arten | Taxom |
| Monophlebidae Signoret, 1875 | Riesenschildläuse | 331 | Arten | Taxom |
| Monotomidae Laporte, 1840 | Detrituskäfer | 298 | Arten | Taxom |
| Morabidae Rehn, 1948 | | 125 | Arten | Taxom |
| Mordellidae Latreille, 1802 | Stachelkäfer | 2346 | Arten | Taxom |
| Mormotomyiidae Austen, 1936 | | 2 | Arten | Taxom |
| Moundthripidae Nel & al., 2007 | | 1 | Art | Taxom |
| Muchoriidae Willmann, 1989 | | 1 | Art | Taxom |
| Musapsocidae Mockford, 1967 | | 9 | Arten | Taxom |
| Muscidae Latreille, 1802 | Echte Fliegen | 6681 | Arten | Taxom |
| Musidoromimidae Rohdendorf, 1962 | | 1 | Art | Taxom |
| Mutillidae André, 1907 | Ameisenwespen | 2130 | Arten | Taxom |
| Mutoviidae Vršanský & A..., 2012 | | 1 | Art | 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 |
| Myerslopiidae Evans, 1957 | | 10 | Arten | Taxom |
| Mylacridae Scudder, 1886 | | 82 | Arten | Taxom |
| Mymaridae Haliday, 1833 | Eierschlupfwespen | 1639 | Arten | Taxom |
| Mymarommatidae Debauche, 1948 | | 101 | Arten | Taxom |
| Myopsocidae Enderlein, 1907 | | 171 | Arten | Taxom |
| Myraboliidae Lawrence and..., 1991 | | 7 | Arten | Taxom |
| Myrmecolacidae Saunders, 1872 | | 149 | Arten | Taxom |
| Myrmecophilidae Saussure, 1874 | Ameisengrillen | 103 | Arten | Taxom |
| Myrmeleontidae Latreille, 1802 | Ameisenjungfern | 2129 | Arten | Taxom |
| Myrmosidae Fox, 1894 | Trugameisen | 12 | Arten | Taxom |
| Mythicomyiidae Melander, 1902 | Zwergwollschweber | 82 | Arten | Taxom |
| Nabidae Costa, 1852 | Sichelwanzen | 243 | Arten | Taxom |
| Nadipteridae Lukashevich, 1995 | | 4 | Arten | Taxom |
| Naibiidae Shcherbakov, 2007 | | 4 | Arten | Taxom |
| Nannochoristidae Tillyard, 1917 | | 20 | Arten | Taxom |
| Nannodastiidae Papp, 1980 | | 3 | Arten | Taxom |
| Nanomantidae | | 1 | Art | Taxom |
| Nanosialidae Shcherbakov, 2013 | | 5 | Arten | Taxom |
| Narkemidae Handlirsch, 1911 | | 2 | Arten | Taxom |
| Natalimyzidae Barraclough ..., 2006 | | 1 | Art | Taxom |
| Naucoridae Leach, 1815 | Ruderwanzen | 502 | Arten | Taxom |
| Neazoniidae Szwedo, 2007 | | 4 | Arten | Taxom |
| Necrotauliidae Handlirsch, 1906 | | 52 | Arten | Taxom |
| Necymylacridae Durden, 1969 | | 18 | 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 |
| Nemopteridae Rambur, 1842 | Fadenhafte | 141 | Arten | Taxom |
| Nemouridae Newman, 1853 | | 825 | Arten | Taxom |
| Neoblattariae Scudder, 1886 | | 5 | Arten | Taxom |
| Neolinognathidae Fahrenholz, 1936 | | 2 | Arten | Taxom |
| Neopseustidae Hering, 1925 | | 7 | Arten | Taxom |
| Neopsylloididae Becker-Migdi..., 1985 | | 3 | Arten | Taxom |
| Neorthroblattinidae Handlirsch, 1906 | | 20 | Arten | Taxom |
| Neotheoridae Kirstensen, 1978 | | 0 | Arten | Taxom |
| Nepidae Latreille, 1802 | Skorpionswanzen | 279 | Arten | Taxom |
| Nepticulidae Stainton, 1854 | Zwergminierfalter | 1456 | Arten | Taxom |
| Neraphidiidae Aristov, 2014 | | 4 | Arten | Taxom |
| Neriidae Hendel, 1916 | | 122 | Arten | Taxom |
| Neurochaetidae Mcalpine, 1978 | | 30 | Arten | Taxom |
| Neurorthidae (Nakahara, 1958) | | 9 | Arten | Taxom |
| Neurostigmatidae | | 9 | Arten | Taxom |
| Nevrorthidae Nakahara, 1958 | | 7 | Arten | Taxom |
| Ningxiapsychidae Hong & Li, 2004 | | 1 | Art | Taxom |
| Ninidae Barber, 1956 | | 8 | Arten | Taxom |
| Nitidulidae Latreille, 1802 | Glanzkäfer | 1724 | Arten | Taxom |
| Nocticolidae Bolivar, 1892 | | 114 | Arten | Taxom |
| Nocticolinae | | 44 | Arten | Taxom |
| Noctuidae Latreille, 1809 | Erdraupen | 20314 | Arten | Taxom |
| Noctuiidae | | 1 | Art | Taxom |
| Nogodinidae Melichar, 1898 | | 380 | Arten | 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 |
| Notoligotomidae Davis, 1940 | | 7 | Arten | Taxom |
| Notonectidae Latreille, 1802 | Rückenschwimmer | 494 | Arten | Taxom |
| Notonemouridae (Ricker, 1950) | | 2 | Arten | Taxom |
| Nugonioneuridae Carpenter, 1976 | | 1 | Art | Taxom |
| Nycteribiidae Samouelle, 1819 | Fledermausfliegen | 75 | Arten | Taxom |
| Nyctiboridae Brunner von ..., 1893 | | 9 | Arten | Taxom |
| Nymphalidae Rafinesque, 1815 | Edelfalter | 12809 | Arten | Taxom |
| Nymphidae Rambur, 1842 | | 44 | Arten | Taxom |
| Nymphitidae Handlirsch, 1906 | | 3 | 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 |
| Ochteridae Kirkaldy, 1906 | | 10 | Arten | Taxom |
| Odiniidae Hendel, 1920 | | 79 | Arten | Taxom |
| Odontoceridae Wallengren, 1891 | | 183 | Arten | Taxom |
| Oecanthidae (Blanchard, 1845) | | 172 | Arten | Taxom |
| Oecanthoperlidae Storozhenko, 1988 | | 1 | Art | Taxom |
| Oeconesidae Tillyard, 1921 | | 21 | Arten | Taxom |
| Oecophoridae Bruand, 1851 | Breitflügelmotten | 4328 | Arten | Taxom |
| Oedemeridae Latreille, 1810 | Engdeckenflügler | 721 | Arten | Taxom |
| Oedischiidae Handlirsch, 1906 | | 34 | Arten | Taxom |
| Oenosandridae Miller, 1991 | | 8 | Arten | Taxom |
| Oestridae Leach, 1815 | Biesfliegen | 253 | Arten | Taxom |
| Olidae Vr?anský & W..., 2017 | | 2 | Arten | Taxom |
| Oligotomidae Enderlein, 1909 | | 55 | Arten | Taxom |
| Omaliidae Handlirsch, 1904 | | 2 | Arten | Taxom |
| Omalisidae Lacordaire, 1857 | Blutkäfer | 2 | Arten | Taxom |
| Omaniidae Cobben, 1970 | | 7 | Arten | Taxom |
| Omethidae LeConte, 1861 | | 28 | Arten | Taxom |
| Ommatidae Sharp & Muir, 1912 | | 204 | Arten | Taxom |
| Ommexechidae Bolivar, 1884 | | 47 | 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 |
| Ortheziidae Green, 1896 | Röhrenschildläuse | 274 | Arten | Taxom |
| Orthomylacridae see Durden, 1969 | | 54 | Arten | Taxom |
| Orthophlebiidae Handlirsch, 1906 | | 169 | Arten | Taxom |
| Orussidae Newman, 1834 | | 77 | Arten | Taxom |
| Osmylidae Leach, 1815 | Bachhafte | 215 | Arten | Taxom |
| Osmylitidae Martynova, 1949 | | 2 | Arten | Taxom |
| Osmylopsychopidae Martynova, 1949 | | 18 | Arten | Taxom |
| Osmylopsychopsidae Martynova, 1949 | | 1 | Art | Taxom |
| Ostomatidae Reitter, 1882 | | 1 | Art | Taxom |
| Othniodellithidae Engel & Huang, 2016 | | 2 | Arten | Taxom |
| Otitidae (Macquart, 1835) | Schmuckfliegen | 740 | Arten | Taxom |
| Oulopterygidae Rehn, 1951 | | 1 | Art | Taxom |
| Oviparosiphidae Shaposhnikov, 1979 | | 25 | Arten | Taxom |
| Oxycarenidae Stål, 1862 | | 150 | Arten | Taxom |
| Oxychirotidae (Meyrick, 1885) | | 1 | Art | Taxom |
| Oxycorynidae (Schoenherr, 1840) | | 116 | Arten | Taxom |
| Oxypeltidae Lacordaire, 1869 | | 5 | Arten | Taxom |
| Pabuonqedidae Vrsansky et al., 2019 | | 2 | Arten | Taxom |
| Pachygronthidae Stål, 1865 | | 78 | Arten | Taxom |
| Pachylembiidae Ross, 2001 | | 1 | Art | Taxom |
| Pachymeridiidae Handlirsch, 1906 | | 37 | Arten | Taxom |
| Pachyneuridae Schiner, 1864 | | 12 | Arten | Taxom |
| Pachynomidae Stål, 1873 | | 4 | Arten | Taxom |
| Pachytroctidae Enderlein, 1911 | | 98 | Arten | Taxom |
| Pachytylopsidae Handlirsch, 1904 | | 6 | Arten | Taxom |
| Paedembiidae Ross, 2006 | | 3 | Arten | Taxom |
| Palaemerobiidae Martynov, 1928 | | 5 | Arten | Taxom |
| Palaeoaphididae Richards, 1966 | | 20 | Arten | Taxom |
| Palaeoblattidae Cockerell, 1927 | | 1 | Art | Taxom |
| Palaeoleontidae Martins-Neto, 1992 | | 21 | Arten | Taxom |
| Palaeomanteidae Handlirsch, 1906 | | 51 | Arten | Taxom |
| Palaeonemouridae N.D. Siniche..., 1987 | | 34 | Arten | Taxom |
| Palaeontinidae Handlirsch, 1906 | | 117 | Arten | Taxom |
| Palaeoperlidae Sharov, 1961 | | 10 | Arten | Taxom |
| Palaeophoridae Rohdendorf, 1951 | | 1 | Art | Taxom |
| Palaeosetidae Turner, 1922 | | 5 | Arten | Taxom |
| Palaephatidae Davis, 1986 | | 39 | Arten | Taxom |
| Paleoblattidae Scudder, 1879 | | 22 | Arten | Taxom |
| Paleomelittidae Engel, 2001 | | 1 | Art | Taxom |
| Paleuthygrammatidae Carpenter, 1943 | | 6 | Arten | Taxom |
| Pallopteridae Loew, 1862 | Zitterfliegen | 113 | Arten | Taxom |
| Pamphagidae Burmeister, 1840 | Steinschrecken | 598 | Arten | Taxom |
| Pamphagodidae Bolivar, 1884 | | 5 | Arten | Taxom |
| Pamphiliidae Cameron, 1890 | Gespinstblattwespen | 241 | Arten | Taxom |
| Panfiloviidae Makarkin, 1990 | | 4 | Arten | Taxom |
| Panorpidae Linnaeus, 1758 | Skorpionsfliegen | 632 | Arten | Taxom |
| Panorpodidae Byers, 1965 | | 32 | Arten | Taxom |
| Pantophthalmidae Williston, 1906 | | 28 | Arten | Taxom |
| Paoliidae Handlirsch, 1906 | | 12 | Arten | Taxom |
| Papilionidae Latreille, 1802 | Ritter | 1817 | Arten | Taxom |
| Parachoristidae Tillyard, 1937 | | 9 | Arten | Taxom |
| Paragryllidae (Desutter-Gra..., 1987) | | 116 | Arten | Taxom |
| Parahygrobiidae Ponomarenko, 1977 | Ausgestorbene Familie | 1 | Art | Taxom |
| Paraknightiidae Evans, 1950 | | 3 | Arten | Taxom |
| Parakseneuridae Yang & al., 2012 | | 16 | Arten | Taxom |
| Parandrexidae Kirejtshuk, 1994 | | 7 | Arten | Taxom |
| Parapamphiliidae Rasnitsyn, 1968 | | 1 | Art | Taxom |
| Paraphrynoveliidae (Anderson, 1978) | | 2 | Arten | Taxom |
| Parasialidae Ponomarenko, 1977 | | 6 | Arten | Taxom |
| Parastrachiidae Oshanin, 1922 | | 2 | Arten | Taxom |
| Paratitanidae Sharov, 1968 | | 11 | Arten | Taxom |
| Paraxymyiidae Rohdendorf, 1946 | | 13 | Arten | Taxom |
| Parmapteridae Aristov & Ra..., 2015 | | 3 | Arten | Taxom |
| Paroryssidae Martynov, 1925 | | 11 | Arten | Taxom |
| Parvaverrucosidae Poinar & Brown, 2006 | | 1 | Art | Taxom |
| Passalidae Leach, 1815 | Zuckerkäfer | 1077 | Arten | Taxom |
| Passalopalpidae Boucher & Bai, 2016 | | 1 | Art | Taxom |
| Passandridae (Erichson, 1845) | | 6 | Arten | Taxom |
| Paucineuridae Hong, 1980 | | 1 | Art | Taxom |
| Pecaroecidae Kéler, 1963 | | 1 | Art | Taxom |
| Pediciidae Osten Sacken, 1860 | | 99 | Arten | Taxom |
| Pedicinidae Enderlein, 1904 | | 16 | Arten | Taxom |
| Pediculidae Leach, 1817 | Menschenläuse | 16 | Arten | Taxom |
| Pelecinidae Haliday, 1839 | | 58 | Arten | Taxom |
| Pelecorhynchidae Philip, 1941 | | 52 | Arten | Taxom |
| Peloridiidae Breddin, 1897 | | 43 | Arten | Taxom |
| Peltoperlidae Claassen, 1931 | | 92 | Arten | Taxom |
| Pennygullaniidae Koteja & Azar, 2008 | | 1 | Art | Taxom |
| Pentatomidae Leach, 1815 | Baumwanzen | 1838 | Arten | Taxom |
| Peradeniidae Naumann & Ma..., 1985 | | 4 | Arten | Taxom |
| Pereboriidae Zalessky, 1930 | | 11 | Arten | Taxom |
| Perforissidae Shcherbakov, 2007 | | 11 | Arten | Taxom |
| Pergidae Rohwer, 1911 | | 249 | Arten | Taxom |
| Perielytridae Zalessky, 1948 | | 4 | Arten | Taxom |
| Perilampidae Latreille, 1809 | | 294 | Arten | Taxom |
| Peripsocidae Roesler, 1944 | | 251 | Arten | Taxom |
| Periscelididae Oldenberg, 1914 | Saftfliegen | 120 | Arten | Taxom |
| Perissommatidae Colless, 1962 | | 13 | Arten | Taxom |
| Perlapsocidae Iraja Pinto ..., 2000 | | 1 | Art | Taxom |
| Perlariopseidae N.D. Siniche..., 1985 | | 46 | Arten | Taxom |
| Perlidae (Latreille, 1802) | | 1399 | Arten | Taxom |
| Perlodidae Klapálek, 1912 | | 442 | Arten | Taxom |
| Perlopseidae Martynov, 1940 | | 3 | Arten | Taxom |
| Permaleurodidae Becker-Migdi..., 1959 | | 1 | Art | Taxom |
| Permaphidopseidae Becker-Migdi..., 1960 | | 2 | Arten | Taxom |
| Permarrhaphidae Martynov, 1930 | | 1 | Art | Taxom |
| Permelcanidae Sharov, 1962 | | 15 | Arten | Taxom |
| Permelytridae Tillyard, 1931 | | 10 | Arten | Taxom |
| Permithonidae Tillyard, 1922 | | 54 | Arten | Taxom |
| Permobiellidae Tillyard, 1937 | | 3 | Arten | Taxom |
| Permocentropidae Martynov, 1932 | | 1 | Art | Taxom |
| Permochoristidae Tillyard, 1918 | | 217 | Arten | Taxom |
| Permocupedidae Martynov, 1933 | | 37 | Arten | Taxom |
| Permofulgoridae Tillyard, 1917 | | 1 | Art | Taxom |
| Permopanorpidae Tillyard, 1926 | | 10 | Arten | Taxom |
| Permopectinidae Aristov, 2005 | | 3 | Arten | Taxom |
| Permophasmatidae Gorochov, 1992 | | 5 | Arten | Taxom |
| Permophilidae Tillyard, 1924 | | 5 | Arten | Taxom |
| Permopsocidae Tillyard, 1926 | | 5 | Arten | Taxom |
| Permoraphidiidae Tillyard, 1932 | | 3 | Arten | Taxom |
| Permosialidae Martynov, 1928 | | 30 | Arten | Taxom |
| Permosynidae Tillyard, 1924 | | 34 | Arten | Taxom |
| Permotanyderidae Riek, 1953 | | 3 | Arten | Taxom |
| Permotermopsidae Martuinov, 1937 | | 8 | Arten | Taxom |
| Permotipulidae Tillyard, 1929 | | 3 | Arten | Taxom |
| Permulidae Aristov & St..., 2011 | | 5 | Arten | Taxom |
| Petrablattinidae Durden, 1969 | | 11 | Arten | Taxom |
| Petrothrincidae Scott, 1985 | | 14 | Arten | Taxom |
| Phacopteronidae Heslop-Harrison, 1958 | | 7 | Arten | Taxom |
| Phaeomyiidae (Verbeke, 1950) | Tausendfüßerfliegen | 7 | Arten | Taxom |
| Phalacridae Leach, 1815 | Glattkäfer | 315 | Arten | Taxom |
| Phalangopsidae (Chopard, 1949) | | 578 | Arten | Taxom |
| Phasmatidae Roberts, 1944 | | 1239 | Arten | Taxom |
| Phasmomimidae Sharov, 1968 | | 31 | Arten | Taxom |
| Phenacoleachiidae Cox, 1984 | | 2 | Arten | Taxom |
| Phengodidae LeConte, 1861 | Federleuchtkäfer | 357 | Arten | Taxom |
| Phenopteridae Carpenter, 1950 | | 2 | Arten | Taxom |
| Philopotamidae Stephens, 1829 | | 1524 | Arten | Taxom |
| Philopteridae Burmeister, 1830 | Federlinge | 2361 | Arten | Taxom |
| Philorheithridae Mosely, 1936 | | 20 | Arten | Taxom |
| Philotarsidae Pearman, 1936 | | 149 | Arten | Taxom |
| Phlaeothripidae Uzel, 1895 | | 3770 | Arten | Taxom |
| Phloeidae Amyot & Serv..., 1843 | | 1 | Art | Taxom |
| Phloeostichidae Reitter, 1911 | Rindenplattkäfer | 8 | Arten | Taxom |
| Phloiophilidae Kiesenwetter, 1863 | Doppelzahnwollhaarkäfer | 3 | Arten | Taxom |
| Phoberoblattidae Durden, 1969 | | 35 | Arten | Taxom |
| Phoenicococcidae Stickney, 1934 | | 2 | 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 |
| Phylliidae Redtenbacher, 1906 | Wandelnde Blätter | 151 | Arten | Taxom |
| Phyllodromiidae (Brunner von ..., 1865) | | 1 | Art | Taxom |
| Phylloxeridae Herrich-Scha..., 1854 | Zwergblattläuse | 98 | Arten | Taxom |
| Phyloblattidae Schneider, 1983 | | 17 | Arten | Taxom |
| Pieridae Duponchel, 1835 | Weißlinge | 2270 | Arten | Taxom |
| Piesmatidae Amyot & Audi..., 1843 | Meldenwanzen | 69 | Arten | Taxom |
| Pincombeidae Tillyard, 1922 | | 7 | Arten | Taxom |
| Pinideliidae Storozhenko, 1997 | | 2 | Arten | Taxom |
| Piophilidae Macquart, 1835 | Käsefliegen | 170 | Arten | Taxom |
| Pipunculidae Walker, 1834 | Augenfliegen | 1808 | Arten | Taxom |
| Pisuliidae Ross, 1967 | | 9 | Arten | Taxom |
| Pityococcidae Mckenzie, 1942 | | 8 | Arten | Taxom |
| Planelytridae Kukalová, 1965 | | 1 | Art | Taxom |
| Plataspidae (Dallas, 1851) | Breitschildwanzen | 37 | Arten | Taxom |
| Plataspididae (Dallas, 1851) | Kugelwanzen | 65 | Arten | Taxom |
| Platygastridae Haliday, 1833 | | 1228 | Arten | Taxom |
| Platyperlidae Sinitshenkova, 1982 | | 10 | 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 |
| Pleidae Fieber, 1817 | Zwergrückenschwimmer | 50 | Arten | Taxom |
| Pleocomidae LeConte, 1861 | | 39 | Arten | Taxom |
| Plesioblattogryllidae Huang & al., 2008 | | 2 | Arten | Taxom |
| Plokiophilidae China, 1953 | | 10 | Arten | Taxom |
| Plumalexiidae Brothers, 2011 | | 1 | Art | Taxom |
| Plumariidae Bischoff, 1914 | | 7 | Arten | Taxom |
| Plutellidae Guenée, 1845 | Halbmotten | 412 | Arten | Taxom |
| Pneumoridae Stål, 1873 | | 18 | Arten | Taxom |
| Podabrocephalidae Pic, 1930 | | 1 | Art | Taxom |
| Podoscirtidae Saussure, 1878 | | 1364 | Arten | Taxom |
| Polycentropodidae Ulmer, 1903 | | 1045 | Arten | Taxom |
| Polyctenidae Westwood, 1874 | Fledermauswanzen | 33 | Arten | Taxom |
| Polyphagidae (Walker, 1868) | | 2 | Arten | Taxom |
| Polyplacidae Fahrenholz, 1912 | | 217 | Arten | Taxom |
| Polystoechotidae Handlirsch, 1906 | | 14 | Arten | Taxom |
| Pompilidae Latreille, 1805 | Wegwespen | 3515 | Arten | Taxom |
| Ponopterixidae Nel & al., 2014 | | 6 | Arten | Taxom |
| Poroblattinidae Handlirsch, 1906 | | 27 | Arten | Taxom |
| Potamocoridae Štys & Jansson, 1988 | | 11 | 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 |
| Prezottophlebiidae Martins-Neto, 2007 | | 1 | Art | Taxom |
| Priasilphidae Crowson, 1973 | | 11 | Arten | Taxom |
| Primipentatomidae Yao, Cai, Ri..., 2013 | | 5 | Arten | Taxom |
| Prionoceridae Lacaordaire, 1857 | | 47 | Arten | Taxom |
| Prionoglarididae Badonnel, 1951 | | 15 | Arten | Taxom |
| Priscaenigmatidae Engel, 2002 | | 3 | Arten | Taxom |
| Prisopodidae Brunner von ..., 1893 | | 88 | Arten | Taxom |
| Probascaniidae Handlirsch, 1921 | | 1 | Art | Taxom |
| Probnidae Sellards, 1909 | | 4 | Arten | Taxom |
| Procercopidae Handlirsch, 1906 | | 39 | Arten | Taxom |
| Prochresmodidae Vishniakova, 1980 | | 7 | 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 |
| Proedischiidae Pinto & Orne..., 1978 | | 15 | Arten | Taxom |
| Progonocimicidae Handlirsch, 1906 | | 85 | Arten | Taxom |
| Prohemerobiidae Handlirsch, 1906 | | 48 | Arten | Taxom |
| Promastacidae Kevan & Wighton, 1981 | | 2 | Arten | Taxom |
| Promecheilidae Lacordaire, 1859 | | 17 | Arten | Taxom |
| Pronemouridae Liu, Sinitsh..., 2011 | | 5 | Arten | Taxom |
| Proneottiophilidae Hennig, 1969 | | 1 | Art | Taxom |
| Propalticidae Crowson, 1952 | | 13 | Arten | Taxom |
| Proparagryllacrididae Riek, 1956 | | 17 | Arten | Taxom |
| Prophalangopsidae Saussure, 1878 | | 122 | Arten | Taxom |
| Prorhyacophilidae Riek, 1955 | | 3 | Arten | Taxom |
| Prosbolidae Handlirsch, 1906 | | 123 | Arten | Taxom |
| Prosbolopseidae Becker-Migdi..., 1946 | | 16 | Arten | Taxom |
| Proscopiidae Serville, 1838 | Pferdekopfschrecken | 239 | 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 |
| Protelytridae Tillyard, 1931 | | 6 | Arten | Taxom |
| Protembiidae Tillyard, 1937 | | 26 | Arten | Taxom |
| Protempididae Ussatchov, 1968 | | 2 | Arten | Taxom |
| Protendipedidae Rohdendorf, 1962 | | 3 | Arten | Taxom |
| Proteremidae Handlirsch, 1906 | | 1 | Art | Taxom |
| Proterhinidae (Fauvel, 1891) | | 2 | Arten | Taxom |
| Protobrachyceridae Rohdendorf, 1962 | | 3 | Arten | Taxom |
| Protocoleidae Tillyard, 1924 | | 7 | Arten | Taxom |
| Protocoridae Handlirsch, 1906 | | 5 | Arten | Taxom |
| Protocucujidae Crowson, 1954 | | 4 | Arten | Taxom |
| Protodiplatyidae Martynov, 1925 | | 17 | Arten | Taxom |
| Protogryllidae Zeuner, 1937 | | 10 | Arten | Taxom |
| Protoligoneuridae Rohdendorf, 1962 | | 6 | Arten | Taxom |
| Protomeropidae Tillyard, 1926 | | 17 | Arten | Taxom |
| Protomphralidae Rohdendorf, 1957 | | 3 | Arten | Taxom |
| Protophasmatidae Brongniart, 1885 | | 6 | Arten | Taxom |
| Protophasmidae (Scudder, 1885) | | 3 | Arten | Taxom |
| Protopleciidae Rohdendorf, 1946 | | 50 | Arten | Taxom |
| Protoprosbolidae Laurentiaux, 1952 | | 1 | Art | Taxom |
| Protopsyllidiidae Becker-Migdi..., 1960 | | 59 | Arten | Taxom |
| Protorhyphidae Handlirsch, 1906 | | 21 | Arten | Taxom |
| Prototheoridae Meyrick, 1917 | | 19 | Arten | Taxom |
| Protoxenidae Pohl, Beutel..., 2005 | | 1 | Art | Taxom |
| Protroctopsocidae Smithers, 1972 | | 3 | Arten | Taxom |
| Pruvostitidae Zalessky, 1929 | | 28 | Arten | Taxom |
| Prygidae Aristov & Ra..., 2014 | | 2 | Arten | Taxom |
| Psammocharidae (Yasumatsu, 1935) | | 0 | Arten | Taxom |
| Pselaphidae (Lameere, 1900) | Palpenkäfer | 5 | Arten | Taxom |
| Psephenidae Lacordaire, 1854 | Bachkäfer | 247 | Arten | Taxom |
| Pseudelcanidae Gorochov, 1987 | | 2 | Arten | Taxom |
| Pseudocaeciliidae Pearman, 1936 | | 333 | Arten | Taxom |
| Pseudococcidae Heymons, 1915 | Schmierläuse | 2341 | Arten | Taxom |
| Pseudomylacridae Handlirsch, 1906 | | 2 | Arten | Taxom |
| Pseudonannochoristidae Novokshonov, 1994 | | 2 | Arten | Taxom |
| Pseudonerthridae Martins-Neto..., 2005 | | 1 | Art | Taxom |
| Pseudophasmatidae Kirby, 1896 | | 432 | Arten | Taxom |
| Pseudophyllodromiidae Hebard, 1929 | | 1170 | 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 |
| Psilopsocidae Roesler, 1944 | | 7 | Arten | Taxom |
| Psocidae Samouelle, 1819 | Holzläuse | 1179 | Arten | Taxom |
| Psocidiidae Tillyard, 1926 | | 16 | Arten | Taxom |
| Psoquillidae Lienhard & S..., 2002 | | 37 | Arten | Taxom |
| Psoropteridae Carpenter, 1977 | | 2 | Arten | Taxom |
| Psychidae Boisduval, 1828 | Echte Sackträger | 1449 | Arten | Taxom |
| Psychodidae Newman, 1834 | Schmetterlingsmücken | 3620 | Arten | Taxom |
| Psychomyiidae Walker, 1852 | | 553 | Arten | Taxom |
| Psychopsidae Handlirsch, 1906 | | 70 | Arten | Taxom |
| Psyllidae Latreille, 1807 | Blattflöhe | 1951 | Arten | Taxom |
| Psyllipsocidae Enderlein, 1903 | | 73 | Arten | Taxom |
| Pteridomylacridae Handlirsch, 1906 | | 12 | Arten | Taxom |
| Pterocimicidae Popov & al., 1994 | | 1 | Art | 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 |
| Pteronarcyidae Enderlein, 1909 | | 19 | Arten | Taxom |
| Pterophoridae Zeller, 1841 | Federgeistchen | 2411 | Arten | Taxom |
| Pteroplistidae (Chopard, 1936) | | 25 | Arten | Taxom |
| Pthiridae Leach, 1817 | | 4 | Arten | Taxom |
| Ptiliidae Heer, 1843 | Federflügler | 1095 | Arten | Taxom |
| Ptilodactylidae Laporte, 1836 | | 498 | Arten | Taxom |
| Ptiloneuridae Eertmoed, 1973 | | 212 | 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 |
| Putoidae Beardsley, 1969 | | 78 | Arten | Taxom |
| Pygidicranidae (Verhoeff, 1902) | | 134 | Arten | Taxom |
| Pygiopsyllidae Wagner, 1939 | | 80 | Arten | Taxom |
| Pyralidae Latreille, 1802 | Echte Zünsler | 7765 | Arten | Taxom |
| Pyrgacrididae Kevan, 1974 | | 2 | Arten | Taxom |
| Pyrgomorphidae Brunner von ..., 1874 | Kegelkopfschrecken | 574 | Arten | Taxom |
| Pyrgotidae Schiner, 1868 | | 384 | Arten | Taxom |
| Pyrochroidae Latreille, 1807 | Feuerkäfer | 172 | Arten | Taxom |
| Pyrrhocoridae Dohrn, 1859 | Feuerwanzen | 71 | Arten | Taxom |
| Pythidae Solier, 1834 | Drachenkäfer | 18 | Arten | Taxom |
| Qinococcidae Wu, 2022 | | 10 | Arten | Taxom |
| Qiyangiricaniidae Szwedo, Wang..., 2011 | | 1 | Art | Taxom |
| Raaschiidae Beckemeyer, 2004 | | 1 | Art | Taxom |
| Radiophronidae Ortega-Blanc..., 2010 | | 2 | Arten | Taxom |
| Rafaelianidae Engel & Nel, 2017 | | 2 | Arten | Taxom |
| Rangomaramidae Jaschhof & D..., 2002 | Langflügel-Pilzmücken | 49 | Arten | Taxom |
| Raphidiidae Latreille, 1810 | Kamelhalsfliegen | 135 | Arten | Taxom |
| Raphidiomimidae Vishniakova, 1973 | | 51 | Arten | Taxom |
| Raphoglidae Béthoux & al., 2002 | | 2 | Arten | Taxom |
| Rasnitsynaphididae Homan & Wegi..., 2011 | | 3 | Arten | Taxom |
| Ratemiidae Kim and Ludwig, 1978 | | 3 | Arten | Taxom |
| Reculidae Handlirsch, 1906 | | 1 | Art | Taxom |
| Reduviidae Latreille, 1807 | Raubwanzen | 7738 | Arten | Taxom |
| Regiatidae Gorochov, 1995 | | 3 | Arten | Taxom |
| Retinaphididae Heie, 2000 | | 2 | Arten | Taxom |
| Rhachiberothidae Tjeder, 1959 | | 16 | 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 |
| Rhaphidophoridae Walker, 1869 | Buckelschrecken | 835 | Arten | Taxom |
| Rhiniidae Brauer & Ber..., 1889 | | 18 | Arten | Taxom |
| Rhinophoridae Robineau-Des..., 1863 | Asselfliegen | 221 | Arten | Taxom |
| Rhinorhipidae Lawrence, 1988 | | 1 | Art | Taxom |
| Rhinotermitidae Froggatt, 1897 | Nasentermiten | 430 | Arten | Taxom |
| Rhipiceridae Latreille, 1834 | Fächerkäfer | 62 | Arten | Taxom |
| Rhipiphoridae Gemminger & ..., 1870 | Fächerkäfer | 83 | Arten | Taxom |
| Rhizoecidae Williams, 1969 | | 192 | Arten | Taxom |
| Rhizophagidae (Shuey, 1996) | | 1 | Art | Taxom |
| Rhombocoleidae Rohdendorf, 1961 | | 25 | Arten | Taxom |
| Rhopalidae Amyot & Serv..., 1843 | Glasflügelwanzen | 283 | 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 |
| Rhyparochromidae Amyot & Serv..., 1843 | | 1854 | Arten | Taxom |
| Rhyphidae (Newman, 1834) | | 4 | Arten | Taxom |
| Ricaniidae Amyot & Audi..., 1843 | | 433 | Arten | Taxom |
| Richardidae Snow, 1896 | | 146 | Arten | Taxom |
| Richardiidae (Snow, 1896) | | 66 | Arten | Taxom |
| Ricinidae Neumann, 1890 | | 120 | Arten | Taxom |
| Rigattopteridae Pinto, 1996 | | 1 | Art | Taxom |
| Riodinidae Grote, 1895 | Würfelfalter | 2235 | Arten | Taxom |
| Ripiphoridae Gemminger & ..., 1870 | Fächerkäfer | 183 | Arten | Taxom |
| Ripipterygidae Ander, 1939 | | 75 | Arten | Taxom |
| Robinjohniidae Martynova, 1948 | | 2 | Arten | Taxom |
| Roeslerianidae Martins-Neto, 1997 | | 1 | Art | Taxom |
| Roeslerstammiidae Bruand, 1850 | | 42 | Arten | Taxom |
| Romaleidae Brunner von ..., 1893 | Lümmelheuschrecken | 544 | 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 |
| Saaloscytinidae Brauckmann, ..., 2006 | | 4 | Arten | Taxom |
| Saldidae Amyot and Se..., 1843 | Springwanzen | 394 | Arten | Taxom |
| Salpingidae Leach, 1815 | Scheinrüßler | 365 | Arten | Taxom |
| Santanmantidae Grimaldi, 2003 | | 1 | Art | 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 |
| Saucrosmylidae Ren & Yin, 2003 | | 3 | Arten | Taxom |
| Saurophthiridae Ponomarenko, 1986 | | 2 | Arten | Taxom |
| Saxonagrionidae Nel & al., 1999 | | 1 | Art | Taxom |
| Scalicidae Kukalová, 1964 | | 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 |
| Scelembiidae Ross, 2001 | | 17 | Arten | Taxom |
| Scelionidae Haliday, 1839 | | 3173 | Arten | Taxom |
| Scenopinidae Burmeister, 1835 | Fensterfliegen | 451 | Arten | Taxom |
| Schizoblattidae Durden, 1969 | | 34 | Arten | Taxom |
| Schizocoleidae Rohdendorf, 1961 | | 89 | Arten | Taxom |
| Schizodactylidae Karny, 1927 | | 8 | Arten | Taxom |
| Schizophoridae Ponomarenko, 1968 | | 55 | Arten | Taxom |
| Schizopodidae (LeConte, 1859) | | 10 | Arten | Taxom |
| Schizopteridae Reuter, 1891 | | 477 | 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 |
| Scopuridae Ueno, 1935 | | 8 | Arten | Taxom |
| Scraptiidae Mulsant, 1856 | Scheinstachelkäfer | 481 | Arten | Taxom |
| Scutelleridae Leach, 1815 | Schildwanzen | 244 | Arten | Taxom |
| Scydmaenidae (Leach, 1815) | Ameisenkäfer | 5845 | Arten | Taxom |
| Scythrididae Rebel, 1901 | Heidefalter | 118 | Arten | Taxom |
| Scytinopteridae Handlirsch, 1906 | | 37 | 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 |
| Serafinidae Koteja, 2008 | | 2 | Arten | Taxom |
| Serendipidae Evenhuis, 1994 | | 3 | Arten | Taxom |
| Sericostomatidae Stephens, 1836 | | 98 | Arten | Taxom |
| Serpentivenidae Shcherbakov, 1984 | | 8 | Arten | Taxom |
| Serphitidae Brues, 1937 | | 19 | Arten | Taxom |
| Serritermitidae Emerson & Kr..., 1975 | | 3 | Arten | Taxom |
| Sesiidae Boisduval, 1828 | Glasflügler | 1564 | Arten | Taxom |
| Shaposhnikoviidae Kononova, 1976 | | 9 | Arten | Taxom |
| Sheimiidae Martynova, 1958 | | 7 | Arten | Taxom |
| Shurabellidae Popov, 1971 | | 7 | Arten | Taxom |
| Sialidae Leach, 1815 | Schlammfliegen | 80 | Arten | Taxom |
| Sialidopsidae Zalesskii, 1926 | | 5 | Arten | Taxom |
| Siberhyphidae Kovalev, 1985 | | 1 | Art | Taxom |
| Siberioperlidae Sinitshenkova, 1983 | | 20 | Arten | Taxom |
| Sibiriothaumatidae Sukatcheva &..., 1998 | | 1 | Art | Taxom |
| Sibyllidae Stål, 1872 | | 3 | Arten | 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 |
| Simulaphididae Shcherbakov, 2007 | | 1 | Art | Taxom |
| Simuliidae Newman, 1834 | Kriebelmücken | 2543 | Arten | Taxom |
| Sinaphididae Zhang & al., 1989 | | 2 | Arten | Taxom |
| Sinembiidae Huang & Nel, 2009 | | 2 | Arten | Taxom |
| Sinisilvanidae (Hong, 2002) | | 1 | Art | Taxom |
| Sinoalidae Wang & Szwedo, 2012 | | 7 | Arten | Taxom |
| Sinojuraphididae Huang & Nel, 2008 | | 1 | Art | Taxom |
| Sinoryssidae Hong, 1983 | | 1 | Art | Taxom |
| Sinosiricidae Hong You-Chong, 1975 | | 1 | Art | Taxom |
| Siricidae Billberg, 1820 | Holzwespen | 113 | Arten | Taxom |
| Sisyridae Handlirsch, 1908 | Schwammfliegen | 70 | Arten | Taxom |
| Sisyrocoridae Handlirsch, 1921 | | 6 | Arten | Taxom |
| Skaliciidae Kukalová, 1964 | | 7 | Arten | Taxom |
| Skokidae Vrsansky, 2007 | | 1 | Art | Taxom |
| Smicripidae Horn, 1879 | | 6 | Arten | Taxom |
| Socialidae Vrsansky, 2010 | | 1 | Art | Taxom |
| Sojanocoleidae Martynov, 1932 | | 1 | Art | Taxom |
| Sojanoraphidiidae Martynova, 1952 | | 4 | Arten | Taxom |
| Solenoptilidae Handlirsch, 1906 | | 5 | Arten | 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 |
| Soyanopteridae Aristov & Ra..., 2011 | | 3 | Arten | Taxom |
| Spaniidae (Nagatomi, 1982) | | 3 | Arten | Taxom |
| Spanioderidae Handlirsch, 1906 | | 27 | 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 |
| Sphaeropsocidae Kolbe, 1883 | | 17 | 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 |
| Spiloblattidae Handlirsch, 1904 | | 5 | Arten | Taxom |
| Spiloblattinidae Handlirsch, 1906 | | 102 | Arten | Taxom |
| Spiralizoridae Kocarek, Ho..., 2020 | | 18 | Arten | Taxom |
| Spongiphoridae Verhoeff, 1902 | | 125 | Arten | Taxom |
| Spurostigmatidae Casasola Gon..., 2006 | | 42 | Arten | Taxom |
| Srokalarvidae Haug & al., 2016 | | 1 | Art | Taxom |
| Staphylinidae Lameere, 1900 | Halbflügler | 66177 | Arten | Taxom |
| Steingeliidae Morrison, 1927 | | 12 | Arten | Taxom |
| Stemmocryptidae Stys, 1983 | | 1 | Art | Taxom |
| Stenelytridae Kukalová, 1966 | | 1 | Art | Taxom |
| Stenoneuridae Handlirsch, 1906 | | 0 | Arten | Taxom |
| Stenopelmatidae Burmeister, 1838 | | 49 | Arten | Taxom |
| Stenopsocidae Pearman, 1936 | | 114 | Arten | Taxom |
| Stenopsychidae Martynov, 1924 | | 123 | Arten | Taxom |
| Stenotrachelidae C. G. Thomson, 1859 | | 37 | Arten | Taxom |
| Stenotritidae (Michener, 2000) | | 1 | Art | Taxom |
| Stenoviciidae Evans, 1956 | | 8 | Arten | Taxom |
| Stenurothripidae Bagnall, 1923 | | 1 | Art | Taxom |
| Stephanastidae Kirejtshuk &..., 2013 | | 1 | Art | Taxom |
| Stephanidae Leach, 1815 | | 197 | Arten | Taxom |
| Stephanocircidae Wagner, 1928 | | 52 | Arten | Taxom |
| Stereopteridae Carpenter, 1950 | | 3 | Arten | Taxom |
| Stictococcidae Lindinger, 1913 | | 20 | Arten | Taxom |
| Stigmacoccidae Morrison giv..., 2006 | | 3 | 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 |
| Strephocladidae Martynov, 1938 | | 5 | Arten | Taxom |
| Strongylophthalmyiidae Hennig, 1940 | | 84 | Arten | Taxom |
| Stygnidae Handlirsch, 1906 | | 1 | Art | Taxom |
| Styloperlidae Illies, 1966 | | 15 | Arten | Taxom |
| Stylopidae Kirby, 1813 | | 324 | Arten | Taxom |
| Subioblattidae (Schneider, 1983) | | 1 | Art | Taxom |
| Surijokocixiidae Shcherbakov, 2000 | | 5 | Arten | Taxom |
| Surijokopsocidae Becker-Migdi..., 1961 | | 1 | Art | Taxom |
| Susumaniidae Gorochov, 1988 | | 6 | Arten | Taxom |
| Sylvabestiidae Aristov, 2000 | | 21 | Arten | Taxom |
| Sylvaphlebiidae Martynov, 1940 | | 9 | Arten | Taxom |
| Symmocidae (Gozmany, 1957) | | 1 | Art | Taxom |
| Synchroidae Lacordaire, 1859 | | 3 | Arten | Taxom |
| Synomaloptilidae Martynov, 1938 | | 1 | Art | 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 |
| Szelegiewicziidae Wegierek, 1989 | | 2 | Arten | Taxom |
| Tabanidae Latreille, 1802 | Bremsen | 5407 | Arten | Taxom |
| Tachardiidae Green, 1896 | | 111 | Arten | Taxom |
| Tachinidae (Robineau-Des..., 1830) | Raupenfliegen | 12291 | Arten | Taxom |
| Tachiniscidae (Kertesz, 1903) | | 1 | Art | Taxom |
| Taeniopterygidae Klapálek, 1905 | | 156 | Arten | Taxom |
| Taimyrocoridae Popov, 2016 | | 1 | Art | Taxom |
| Taiophlebiidae Martins-Neto, 2007 | | 2 | Arten | Taxom |
| Tajmyraphididae Kononova, 1975 | | 4 | Arten | Taxom |
| Taldycupedidae Rohdendorf, 1961 | | 35 | Arten | Taxom |
| Tanaoceridae Rehn, 1948 | | 4 | 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 |
| Tarachocelidae Mey, Wichard..., 2017 | | 2 | Arten | Taxom |
| Tarachodidae Handlirsch, 1930 | | 249 | Arten | Taxom |
| Tasimiidae Riek, 1968 | | 9 | Arten | Taxom |
| Tasmosalpingidae Lawrence and..., 1991 | | 2 | Arten | Taxom |
| Taymyrelectronidae Botosaneanu ..., 1983 | | 1 | Art | Taxom |
| Tcholmanvissiidae Zalessky, 1934 | | 7 | Arten | Taxom |
| Telegeusidae (LeConte, 1861) | | 20 | Arten | Taxom |
| Tenebrionidae Latreille, 1802 | Dunkelkäfer | 9493 | Arten | Taxom |
| Teneopteridae (Richardson, 1956) | | 1 | Art | Taxom |
| Tenthredinidae Latreille, 1804 | Blattwespen | 3405 | Arten | Taxom |
| Tephritidae Newman, 1834 | Bohrfliegen | 6039 | Arten | Taxom |
| Teratembiidae Krauss, 1911 | | 52 | Arten | Taxom |
| Teratomyzidae Hennig, 1969 | | 11 | Arten | Taxom |
| Teredidae Seidlitz, 1888 | | 147 | Arten | Taxom |
| Termitaphididae Myers, 1924 | | 15 | Arten | Taxom |
| Termitidae Latreille, 1802 | Höhere Termiten | 2399 | Arten | Taxom |
| Termopsidae Grassé, 1949 | Feuchtholztermiten | 34 | Arten | Taxom |
| Tessaratomidae Stål, 1864 | | 276 | 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 |
| Tetrigidae Rambur, 1838 | Dornschrecken | 2407 | Arten | Taxom |
| Tettigarctidae Distant, 1905 | | 43 | Arten | Taxom |
| Tettigometridae Germar, 1821 | Ameisenzikaden | 123 | Arten | Taxom |
| Tettigoniidae Krauss, 1902 | Laubheuschrecken | 8318 | Arten | Taxom |
| Tettoedischiidae Gorochov, 1987 | | 3 | Arten | Taxom |
| Thanerocleridae Chapin, 1921 | | 18 | Arten | Taxom |
| Thaumaleidae Bezzi, 1913 | Dunkelmücken | 201 | Arten | Taxom |
| Thaumastellidae Štys, 1864 | | 1 | Art | Taxom |
| Thaumastocoridae Kirkaldy, 1908 | | 40 | Arten | Taxom |
| Thaumatomeropidae Willmann, 1978 | | 6 | Arten | Taxom |
| Thelaxidae (Baker, 1920) | Maskenläuse | 1 | Art | Taxom |
| Therevidae Newman, 1834 | Dolchfliegen | 1473 | Arten | Taxom |
| Thericleidae Burr, 1899 | | 223 | Arten | Taxom |
| Thespidae Giglio-Tos, 1919 | | 191 | Arten | Taxom |
| Thoronysididae Handlirsch, 1919 | | 1 | Art | Taxom |
| Thripidae Stevens, 1829 | Blasenfüßer | 2537 | Arten | Taxom |
| Throscidae Laporte, 1840 | Hüpfkäfer | 202 | Arten | Taxom |
| Thueringoedischiidae Zessin, 1997 | | 3 | Arten | Taxom |
| Thyatiridae (Blake, 1936) | Eulenspinner | 0 | Arten | Taxom |
| Thynnidae Shuckard, 1841 | | 750 | Arten | Taxom |
| Thyreocoridae Amyot and Se..., 1843 | | 80 | Arten | Taxom |
| Thyrididae Herrich-Schä..., 1846 | Fensterfleckchen | 630 | Arten | Taxom |
| Tibicinidae (Distant, 1905) | | 1 | Art | Taxom |
| Tillyardembiidae Zalessky, 1938 | | 7 | Arten | Taxom |
| Tillyardipteridae Lukashevich ..., 1999 | | 2 | Arten | Taxom |
| Timematidae Caudell, 1903 | | 27 | Arten | Taxom |
| Tineidae Latreille, 1810 | Echte Motten | 3785 | Arten | Taxom |
| Tineodidae Meyrick, 1885 | | 15 | Arten | Taxom |
| Tingidae Laporte, 1832 | Blasenwanzen | 3100 | 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 |
| Tococladidae Carpenter, 1966 | | 8 | Arten | Taxom |
| Tomiidae Martynov, 1936 | | 1 | Art | Taxom |
| Tomiochoristidae Martynova, 1958 | | 6 | Arten | Taxom |
| Torirostratidae Yao, Cai, Sh..., 2014 | | 1 | Art | Taxom |
| Torridincolidae Steffan, 1964 | | 43 | Arten | Taxom |
| Torrirostratidae Yao & al., 2014 | | 1 | Art | Taxom |
| Tortricidae Latreille, 1803 | Blattroller | 13843 | Arten | Taxom |
| Torymidae Walker, 1833 | Erzwespen | 1253 | Arten | Taxom |
| Toxoderidae Giglio-Tos, 1919 | | 58 | Arten | Taxom |
| Trachopterygidae Carpenter, 1976 | | 1 | Art | Taxom |
| Trachypachidae C. G. Thomson, 1857 | | 91 | Arten | Taxom |
| Triadocupedidae (Ponomarenko, 1966) | | 1 | Art | Taxom |
| Triaplidae Ponomarenko, 1977 | Ausgestorbene Familie | 4 | Arten | Taxom |
| Triassoaphididae Heie, 1999 | | 1 | Art | Taxom |
| Triassoblattidae Durden, 1969 | | 33 | Arten | Taxom |
| Triassocoridae Tillyard, 1922 | | 5 | Arten | Taxom |
| Triassomantidae Tillyard, 1922 | | 1 | Art | Taxom |
| Trichoceridae Rondani, 1841 | Wintermücken | 470 | Arten | Taxom |
| Trichodectidae Kellogg, 1896 | | 358 | Arten | Taxom |
| Trichogrammatidae Haliday, 1851 | | 915 | Arten | Taxom |
| Trichopsocidae Pearman, 1936 | | 15 | Arten | Taxom |
| Tricoleidae (Ponomarenko, 1969) | | 18 | Arten | Taxom |
| Trictenotomidae Blanchard, 1845 | | 18 | Arten | Taxom |
| Tridactylidae Saussure, 1874 | Grabschrecken | 171 | Arten | Taxom |
| Trigonalidae (Cresson, 1887) | Leistenwespen | 61 | Arten | Taxom |
| Trigonalyidae | | 3 | Arten | Taxom |
| Trigonidiidae (Saussure, 1870) | | 1102 | Arten | Taxom |
| Trigonopterygidae Walker, 1870 | | 18 | Arten | Taxom |
| Trimenoponidae Harrison, 1916 | | 23 | Arten | Taxom |
| Triozidae Löw, 1879 | | 579 | Arten | Taxom |
| Trisegmentatidae Zhang, Sun &..., 1994 | | 1 | Art | Taxom |
| Tristiridae Rehn, 1906 | | 33 | Arten | Taxom |
| Tritarsidae Hong, 2002 | | 1 | Art | Taxom |
| Troctopsocidae Mockford, 1967 | | 26 | Arten | Taxom |
| Trogidae (MacLeay, 1819) | Erdkäfer | 584 | Arten | Taxom |
| Trogiidae Enderlein, 1903 | Staubläuse | 85 | Arten | Taxom |
| Trogossitidae Latreille, 1802 | Flachkäfer | 479 | Arten | Taxom |
| Tropiduchidae Stål, 1866 | Mückenzikaden | 602 | Arten | Taxom |
| Tryonicidae McKittrick &..., 1965 | | 25 | Arten | Taxom |
| Tshekarchiereidae Novokshonov, 1997 | | 1 | Art | Taxom |
| Tshekardocoleidae Rohdendorf, 1944 | | 22 | Arten | Taxom |
| Tshekardoperlidae N.D. Siniche..., 1987 | | 5 | Arten | Taxom |
| Tunguskapteridae Storozhenko ..., 1995 | | 1 | Art | Taxom |
| Tuphellidae Gorochov, 1988 | | 8 | Arten | Taxom |
| Uenoidae Iwata, 1927 | | 25 | Arten | Taxom |
| Ulidiidae Macquart, 1835 | Metallfliegen | 105 | Arten | Taxom |
| Ulodidae Pascoe, 1869 | | 9 | Arten | Taxom |
| Ulopidae (Le Peletier ..., 1825) | | 173 | Arten | Taxom |
| Ulyanidae (Zherikhin, 1993) | | 2 | Arten | Taxom |
| Umenocoleidae Chen & Tian, 1973 | | 27 | Arten | Taxom |
| Undopterigidae (Kozlov, 1988) | | 3 | Arten | Taxom |
| Uninervidae Becker-Migdi..., 1951 | | 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 |
| Urostylidae (Dallas, 1851) | | 29 | Arten | Taxom |
| Urostylididae Dallas, 1851 | | 1 | Art | Taxom |
| Valeseguyidae Amorim & Gri..., 2006 | | 3 | Arten | Taxom |
| Vanhorniidae Crawford, 1909 | | 2 | Arten | Taxom |
| Veliidae Amyot & Serv..., 1843 | Bachläufer | 1273 | Arten | Taxom |
| Velocipedidae Bergroth, 1891 | | 29 | Arten | Taxom |
| Venicoridae Yao, Ren & Cai, 2012 | | 4 | 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 |
| Vetanthocoridae Yao, Cai & Ren, 2006 | | 16 | Arten | Taxom |
| Vitimiidae Sharov, 1968 | | 4 | Arten | Taxom |
| Vitimotauliidae Sukatsheva, 1968 | | 25 | Arten | Taxom |
| Vladipteridae Shcherbakov, 1995 | | 4 | Arten | Taxom |
| Volitorididae Hong, 1982 | | 1 | Art | Taxom |
| Weitschatidae Koteja, 2008 | | 3 | Arten | Taxom |
| Weiwoboidae Lin, Szwedo,..., 2010 | | 1 | Art | Taxom |
| Westphalopsocidae Azar & al., 2013 | | 1 | Art | Taxom |
| Westphalothripidesidae Nel, Azar, ..., 2012 | | 1 | Art | Taxom |
| Whalleyanidae Minet, 1991 | | 2 | Arten | Taxom |
| Xenasteiidae Hardy, 1980 | | 13 | Arten | Taxom |
| Xenidae Pohl & Beutel, 2005 | | 107 | Arten | Taxom |
| Xenoblattidae Durden, 1969 | | 21 | Arten | Taxom |
| Xenochoristidae (Riek, 1953) | | 1 | Art | Taxom |
| Xenopteridae Riek, 1955 | | 22 | Arten | Taxom |
| Xiphiopsyllidae Wagner, 1939 | | 8 | Arten | Taxom |
| Xiphocentronidae Schmid, 1982 | | 156 | Arten | Taxom |
| Xiphopteridae Sharov, 1968 | | 3 | 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 |
| Xylococcidae (Pergrande, 1898) | | 14 | Arten | Taxom |
| Xylomyidae Verrall, 1901 | Holz-Waffenfliegen | 163 | Arten | Taxom |
| Xylophagidae Fallen, 1810 | Holzfliegen | 168 | Arten | Taxom |
| Xyloryctidae Meyrick, 1890 | | 1079 | Arten | Taxom |
| Xyronotidae Bolivar, 1909 | | 4 | 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 |
| Yuripopovinidae Azar & al., 2011 | | 2 | Arten | Taxom |
| Zhangsolvidae Nagatomi & Yang, 1998 | | 8 | Arten | Taxom |
| Zopheridae Solier, 1834 | Rindenkäfer | 1163 | Arten | Taxom |
| Zorotypidae Silvestri, 1913 | | 59 | Arten | Taxom |
| Zygaenidae Latreille, 1809 | Blutströpfchen | 906 | Arten | Taxom |
| Zygopsocidae Tillyard, 1935 | | 1 | Art | Taxom |
