| Achilidae Stål, 1866 | Achilid Planthoppers | 3 | Species | Taxom |
| Acrididae MacLeay, 1819 | Grasshoppers and locusts | 1 | Species | Taxom |
| Actinoscytinidae (Evans, 1956) | | 1 | Species | Taxom |
| Ademosynidae Ponomarenko, 1968 | | 3 | Species | Taxom |
| Aerophasmidae Martynov, 1928 | | 6 | Species | Taxom |
| Aeschnidiidae Needham, 1903 | Small darner | 33 | Species | Taxom |
| Aeshnidae Rambur, 1842 | Darners | 7 | Species | Taxom |
| Aetheogrammatidae Ren & Michae..., 2008 | | 4 | Species | Taxom |
| Agaonidae Walker, 1848 | Fig wasp | 1 | Species | Taxom |
| Agyrtidae Thomson, 1859 | Primitive carrion beetles | 3 | Species | Taxom |
| Aktassiidae Pritykina, 1968 | | 5 | Species | Taxom |
| Alavarommatidae Ortega-Blanc..., 2011 | | 1 | Species | Taxom |
| Alerollidae Kaddumi, 2005 | | 1 | Species | Taxom |
| Aleyrodidae Westwood, 1840 | Whiteflies | 9 | Species | Taxom |
| Allopetaliidae Cockerell, 1913 | | 2 | Species | Taxom |
| Alydidae Amyot & Serv..., 1843 | Bean bugs | 1 | Species | Taxom |
| Amorphoscelidae Stål, 1877 | | 1 | Species | Taxom |
| Amphientomidae Enderlein, 1903 | Tropical Barklice | 1 | Species | Taxom |
| Ampulicidae Shuckard, 1840 | Ampulicid wasps | 19 | Species | Taxom |
| Anaxyelidae Martynov, 1925 | Anaxyelids | 9 | Species | Taxom |
| Aneuretopsychidae Rasnitsyn & ..., 1990 | | 5 | Species | Taxom |
| Angarosphecidae Rasnitsyn, 1975 | | 7 | Species | Taxom |
| Anisolabididae Verhoeff, 1902 | | 8 | Species | Taxom |
| Anisopodidae Knab, 1912 | Window Midges | 8 | Species | Taxom |
| Anostostomatidae Saussure, 1859 | Wetas & King Crickets | 1 | Species | Taxom |
| Antefungivoridae Rohdendorf, 1938 | | 5 | Species | Taxom |
| Anthicidae Latreille, 1819 | Ant beetles | 1 | Species | Taxom |
| Anthocephalidae Kaddumi, 2005 | | 1 | Species | Taxom |
| Anthocoridae Fieber, 1837 | Flower bugs | 3 | Species | Taxom |
| Anthomyzidae Czerny, 1903 | Anthomyzid flies | 1 | Species | Taxom |
| Anthribidae Billberg, 1820 | Fungus Weevil | 2 | Species | Taxom |
| Aphididae Latreille, 1802 | Aphids | 10 | Species | Taxom |
| Apidae Latreille, 1802 | Bumble bees | 1 | Species | Taxom |
| Apticoccidae Vea & Grimaldi, 2015 | | 3 | Species | Taxom |
| Aradidae Spinola, 1837 | Flat bug | 1 | Species | Taxom |
| Araripeblattidae Martins-Neto..., 2010 | | 3 | Species | Taxom |
| Araripechlorogomphidae Bechly & Ueda, 2002 | | 1 | Species | Taxom |
| Araripelibellulidae Bechly, 1996 | | 8 | Species | Taxom |
| Araripeneuridae Martins-Neto..., 1989 | | 6 | Species | Taxom |
| Araripephlebiidae Bechly, 1998 | | 1 | Species | Taxom |
| Archaeatropidae Baz & Ortuño, 2000 | | 10 | Species | Taxom |
| Archaeocynipidae Rasnitsyn & ..., 1988 | | 3 | Species | Taxom |
| Archaeoserphitidae Engel, 2015 | | 1 | Species | Taxom |
| Archegocimicidae Handlirsch, 1906 | | 7 | Species | Taxom |
| Archijassidae Becker-Migdi..., 1962 | | 9 | Species | Taxom |
| Archimylacridae Handlirsch, 1906 | | 1 | Species | Taxom |
| Archipsyllidae Handlirsch, 1908 | | 2 | Species | Taxom |
| Archisargidae Rohdendorf, 1962 | | 5 | Species | Taxom |
| Archizelmiridae Rohdendorf, 1962 | | 2 | Species | Taxom |
| Argentinoblattidae Martins-Neto..., 2005 | | 0 | Species | Taxom |
| Ascalaphidae Rambur, 1842 | Owlflies | 2 | Species | Taxom |
| Ascalochrysidae Ren & Makarkin, 2009 | | 1 | Species | Taxom |
| Asilidae Latreille, 1802 | Assassin flies | 1 | Species | Taxom |
| Asiochaoboridae Hong & Wang, 1990 | | 4 | Species | Taxom |
| Asiopteridae Pritykina, 1968 | | 1 | Species | Taxom |
| Atelestidae Hennig, 1970 | | 6 | Species | Taxom |
| Athericidae Stuckenberg, 1973 | Athericid flies | 7 | Species | Taxom |
| Attelabidae Billberg, 1820 | Leaf Rolling Weevil | 2 | Species | Taxom |
| Aulacidae Shuckard, 1842 | Aulacid wasps | 29 | Species | Taxom |
| Australochoristidae Krzemi?ski, ..., 2015 | | 1 | Species | Taxom |
| Axymyiidae Rohdendorf, 1946 | Axymyiidae flies | 3 | Species | Taxom |
| Babinskaiidae Martins-Neto..., 1989 | | 5 | Species | Taxom |
| Baetidae Leach, 1815 | Mayflies | 1 | Species | Taxom |
| Baetiscidae Banks, 1900 | Armored Mayflies | 1 | Species | Taxom |
| Baissidae Rasnitsyn, 1975 | | 1 | Species | Taxom |
| Baissodidae Benton, 1993 | | 8 | Species | Taxom |
| Baissoferidae Sukatsheva, 1968 | | 5 | Species | Taxom |
| Baissogryllidae Gorochov, 1985 | | 33 | Species | Taxom |
| Baissomantidae Gratshev & Z..., 1993 | | 2 | Species | Taxom |
| Baissopteridae Martynova, 1961 | | 20 | Species | Taxom |
| Bajsaphididae Homan, Zyla ..., 2015 | | 5 | Species | Taxom |
| Baleyopterygidae N.D. Siniche..., 1985 | | 3 | Species | Taxom |
| Belidae Schönherr, 1826 | Belid Beetle | 3 | Species | Taxom |
| Belostomatidae Leach, 1815 | Alligator ticks | 7 | Species | Taxom |
| Berothidae Handlirsch, 1906 | Beaded lacewing | 11 | Species | Taxom |
| Bethylidae Halliday, 1839 | Bethylid wasps | 8 | Species | Taxom |
| Bethylonymidae Rasnitsyn, 1975 | | 2 | Species | Taxom |
| Bibionidae Fleming, 1821 | Bibionid flies | 3 | Species | Taxom |
| Bittacidae Handlirsch, 1906 | Hanging scorpionflies | 8 | Species | Taxom |
| Blattellidae (Karny, 1908) | German Cockroach | 5 | Species | Taxom |
| Blattidae Stephens, 1829 | American cockroaches | 2 | Species | Taxom |
| Blattulidae Vishnyokova, 1982 | | 30 | Species | Taxom |
| Blephariceridae Loew, 1861 | Mountain midges | 1 | Species | Taxom |
| Boholdoyidae Kovalev, 1985 | | 1 | Species | Taxom |
| Bolitophilidae Malloch, 1917 | | 1 | Species | Taxom |
| Bombyliidae Latreille, 1802 | Bee Flies | 2 | Species | Taxom |
| Boreidae Latreille, 1816 | Snow fleas | 1 | Species | Taxom |
| Bostrichidae Latreille, 1802 | Auger beetles | 1 | Species | Taxom |
| Bouretidae Martins-Neto, 2001 | | 1 | Species | Taxom |
| Brachycentridae Ulmer, 1903 | Humpless Casemaker Caddisflies | 1 | Species | Taxom |
| Braconidae Latreille, 1829 | Braconid wasps | 5 | Species | Taxom |
| Brentidae Billberg, 1820 | Brenthidae | 4 | Species | Taxom |
| Brongniartiellidae Martynova, 1949 | | 2 | Species | Taxom |
| Buprestidae Leach, 1815 | Flat-headed wood-borers | 51 | Species | Taxom |
| Byrrhidae Latreille, 1804 | Moss beetles | 6 | Species | Taxom |
| Calamoceratidae Ulmer, 1905 | | 1 | Species | Taxom |
| Callaphididae (Borner, 1952) | | 1 | Species | Taxom |
| Caloblattinidae Vršanský & A..., 2000 | | 5 | Species | Taxom |
| Campterophlebiidae Handlirsch, 1920 | | 2 | Species | Taxom |
| Canadaphididae Richards, 1966 | | 1 | Species | Taxom |
| Carabidae Latreille, 1802 | Carabid beetles | 49 | Species | Taxom |
| Caridae Thompson, 1992 | | 26 | Species | Taxom |
| Cecidomyiidae Newman, 1834 | Forest Midges | 6 | Species | Taxom |
| Cephidae Newman, 1834 | Cephids | 2 | Species | Taxom |
| Cerambycidae Latreille, 1802 | Long Horn beetles | 9 | Species | Taxom |
| Ceratopogonidae Newman, 1834 | Biting midge | 47 | Species | Taxom |
| Cercopidae Leach, 1815 | Froghopper | 1 | Species | Taxom |
| Cercopionidae Hamilton, 1990 | | 1 | Species | Taxom |
| Cerophytidae Latreille, 1834 | Cerophytid beetles | 4 | Species | Taxom |
| Cerylonidae Billberg, 1820 | Cerylid Kingfishers | 1 | Species | Taxom |
| Chaeteessidae Handlirsch, 1920 | | 4 | Species | Taxom |
| Chaoboridae Newman, 1834 | Phantom midge | 16 | Species | Taxom |
| Chelonariidae Blanchard, 1845 | Chelonarid beetles | 1 | Species | Taxom |
| Chimeromyiidae Grimaldi & C..., 2009 | | 7 | Species | Taxom |
| Chironomidae Erichson, 1842 | Chironomids | 42 | Species | Taxom |
| Chloroperlidae Okamoto, 1912 | Green stoneflies | 1 | Species | Taxom |
| Choristidae Esben-Petersen, 1915 | | 1 | Species | Taxom |
| Chresmodidae Haase, 1890 | | 8 | Species | Taxom |
| Chrysididae Latreille, 1802 | Chrysidid wasps | 1 | Species | Taxom |
| Chrysomelidae Latreille, 1802 | Casebearers | 7 | Species | Taxom |
| Chrysopidae Schneider, 1851 | And Green Lacewings | 10 | Species | Taxom |
| Chrysoraphidiidae Liu, Ren, & ..., 2014 | | 1 | Species | Taxom |
| Cicadellidae Latreille, 1802 | Cicadellids | 5 | Species | Taxom |
| Cicadidae Westwood, 1840 | Cicada | 41 | Species | Taxom |
| Cimbicidae Kirby, 1837 | Cimbicid sawflies | 1 | Species | Taxom |
| Cimbrophlebiidae Willmann, 1977 | Hangingfly | 3 | Species | Taxom |
| Cixiidae Spinola, 1839 | Cixid planthoppers | 9 | Species | Taxom |
| Clambidae Fischer, 1821 | Fringe-winged beetles | 1 | Species | Taxom |
| Cleridae Latreille, 1802 | Checkered Beetle | 1 | Species | Taxom |
| Coccinellidae Latreille, 1807 | Coccinelles | 1 | Species | Taxom |
| Coelocatiniidae Ponomarenko, 1968 | | 2 | Species | Taxom |
| Coleocatiniidae Ponomarenko ..., 2015 | | 1 | Species | Taxom |
| Coniopterygidae Burmeister, 1839 | Dusty lacewings | 7 | Species | Taxom |
| Coptoclavidae Ponomarenko, 1961 | Extinct family | 18 | Species | Taxom |
| Corduliidae Selys-Longch..., 1850 | Baskettails | 2 | Species | Taxom |
| Coreidae Leach, 1815 | Broad-headed bugs | 6 | Species | Taxom |
| Corixidae Leach, 1815 | Lesser Water-Boatman | 22 | Species | Taxom |
| Corydalidae Burmeister, 1839 | Dobsonflies | 3 | Species | Taxom |
| Corydiidae de Saussure, 1864 | Sand cockroaches | 5 | Species | Taxom |
| Crabronidae Latreille, 1802 | Bee Wolves | 5 | Species | Taxom |
| Cratomastotermitidae Engel, Grima..., 2009 | | 1 | Species | Taxom |
| Cratopetaliidae Bechly, 2010 | | 1 | Species | Taxom |
| Cretacoenagrionidae Bechly, 1996 | | 1 | Species | Taxom |
| Cretapetaluridae Bechly, 1996 | | 4 | Species | Taxom |
| Cretomantidae Gratshev & Z..., 1994 | | 1 | Species | Taxom |
| Cryptophagidae Kirby, 1937 | Mould beetles | 4 | Species | Taxom |
| Culicidae Meigen, 1818 | Mosquito | 2 | Species | Taxom |
| Cupedidae Laporte, 1836 | Cupedids | 43 | Species | Taxom |
| Curculionidae Latreille, 1802 | Ambrosia beetles | 16 | Species | Taxom |
| Cydnidae Billberg, 1820 | Burrower bugs | 8 | Species | Taxom |
| Cymatophlebiidae Handlirsch, 1906 | | 6 | Species | Taxom |
| Cynipidae Latreille, 1802 | Cynipid gall wasps | 3 | Species | Taxom |
| Dascillidae Guérin-Ménev..., 1843 | Orchid beetles | 1 | Species | Taxom |
| Dermestidae Hope, 1840 | Carpet beetles | 2 | Species | Taxom |
| Diapriidae Latreille, 1796 | Diapriid wasps | 8 | Species | Taxom |
| Diechoblattinidae Handlirsch, 1906 | | 3 | Species | Taxom |
| Dipteromantispidae Makarkin & al., 2013 | | 1 | Species | Taxom |
| Dolichopodidae Latreille, 1809 | Long legged flies | 2 | Species | Taxom |
| Dryinidae Haliday, 1840 | Dryinid wasps | 9 | Species | Taxom |
| Dysmorphoptilidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Dysoneuridae Sukatsheva, 1968 | | 4 | Species | Taxom |
| Dytiscidae Leach, 1815 | Diving beetles | 14 | Species | Taxom |
| Eadiidae Vršanský, 2009 | | 1 | Species | Taxom |
| Ebboidae Perrichot, N..., 2006 | | 1 | Species | Taxom |
| Elateridae Leach, 1815 | Click Beetle | 30 | Species | Taxom |
| Elcanidae Handlirsch, 1906 | | 19 | Species | Taxom |
| Electrentomidae Enderlein, 1911 | | 2 | Species | Taxom |
| Electrococcidae Koteja, 2000 | | 1 | Species | Taxom |
| Elipsocidae Pearman, 1936 | Damp Barklice | 1 | Species | Taxom |
| Elliidae Krzeminska, ..., 1993 | | 3 | Species | Taxom |
| Ellinaphididae Kania & Wegi..., 2008 | | 28 | Species | Taxom |
| Elodophthalmidae Kirejtshuk &..., 2008 | | 2 | Species | Taxom |
| Embolemidae Förster, 1856 | Embolemid wasps | 1 | Species | Taxom |
| Empheriidae Enderlein, 1906 | | 3 | Species | Taxom |
| Empididae Latreille, 1809 | Balloon flies | 9 | Species | Taxom |
| Encyrtidae Walker, 1837 | Encyrtid wasps | 1 | Species | Taxom |
| Eneopteridae (Saussure, 1893) | Bush cricket | 1 | Species | Taxom |
| Englathaumatidae Novokshonov ..., 2016 | | 2 | Species | Taxom |
| Enicocephalidae Stål, 1860 | Gnat bug | 1 | Species | Taxom |
| Eocorduliidae Bechly, 1996 | | 1 | Species | Taxom |
| Eoichneumonidae (Jell & Duncan, 1986) | | 15 | Species | Taxom |
| Eolepidopterigidae Rasnitsyn, 1983 | | 2 | Species | Taxom |
| Eomeropidae Cockerell, 1909 | | 3 | Species | Taxom |
| Eoscarterellidae Evans, 1956 | | 1 | Species | Taxom |
| Ephemeridae Leach, 1817 | Burrowing mayflies | 2 | Species | Taxom |
| Ephialtitidae Handlirsch, 1906 | | 10 | Species | Taxom |
| Erebidae Leach, 1815 | Erebid Moths | 1 | Species | Taxom |
| Eremazidae Iablokoff-Kh..., 1977 | | 2 | Species | Taxom |
| Eremochaetidae Ussatchov, 1968 | | 17 | Species | Taxom |
| Eucinetidae Lacordaire, 1857 | Plate-thigh beetle | 4 | Species | Taxom |
| Eucnemidae Eschscholtz, 1829 | Click Beetles | 1 | Species | Taxom |
| Eumastacidae Burr, 1898 | Matchstick grasshoppers | 1 | Species | Taxom |
| Evaniidae Latreille, 1802 | Ensign wasp | 18 | Species | Taxom |
| Falsiformicidae Rasnitsyn, 1975 | | 1 | Species | Taxom |
| Flatidae Spinola, 1839 | Flatid planthoppers | 1 | Species | Taxom |
| Formicidae Latreille, 1809 | Ants | 7 | Species | Taxom |
| Fulgoridae Latreille, 1807 | Fulgorid Planthopper | 1 | Species | Taxom |
| Fulgoridiidae Handlirsch, 1939 | | 1 | Species | Taxom |
| Fungivoritidae Rohdendorf, 1957 | | 1 | Species | Taxom |
| Gasteruptiidae Ashmead, 1900 | Carrot Wasps | 1 | Species | Taxom |
| Gelastocoridae Kirkaldy, 1897 | Toad bug | 2 | Species | Taxom |
| Genaphididae Handlirsch, 1907 | | 3 | Species | Taxom |
| Geotrupidae Latreille, 1802 | Dor beetles | 5 | Species | Taxom |
| Geraridae Scudder, 1885 | | 1 | Species | Taxom |
| Gerridae Leach, 1815 | Jesus bugs | 1 | Species | Taxom |
| Glaphyridae MacLeay, 1819 | Bumble bee scarab beetle | 23 | Species | Taxom |
| Glaresidae Kolbe, 1905 | Enigmatic scarab beetle | 6 | Species | Taxom |
| Glossosomatidae Wallengren, 1891 | Little Black Caddisflies | 1 | Species | Taxom |
| Gomphaeschnidae Tillyard & F..., 1940 | | 16 | Species | Taxom |
| Gomphidae Rambur, 1842 | Club-tailed dragonflies | 16 | Species | Taxom |
| Gondvanogomphidae Bechly, 1996 | | 1 | Species | Taxom |
| Grammolingiidae Ren, 2002 | | 7 | Species | Taxom |
| Grammostylidae Panfilov, 1980 | | 1 | Species | Taxom |
| Gripopterygidae Enderlein, 1909 | | 2 | Species | Taxom |
| Gryllidae Bolivar, 1878 | Crickets | 10 | Species | Taxom |
| Gryllomantidae Gorochov, 2006 | | 1 | Species | Taxom |
| Gryllotalpidae Saussure, 1870 | Mole cricket | 5 | Species | Taxom |
| Gyrinidae Latreille, 1802 | Whirligig beetle | 4 | Species | Taxom |
| Gyroblattidae Durden, 1969 | | 1 | Species | Taxom |
| Hageniidae Tillyard & F..., 1940 | | 1 | Species | Taxom |
| Haglidae Handlirsch, 1906 | Hump-winged cricket | 7 | Species | Taxom |
| Haglotettigoniidae Gorochov, 1988 | | 2 | Species | Taxom |
| Haliplidae Aubé, 1836 | Crawling Water Beetle | 3 | Species | Taxom |
| Hammanococcidae Koteja & Azar, 2008 | | 1 | Species | Taxom |
| Hebeigrammidae Hong, 2003 | | 1 | Species | Taxom |
| Helophoridae (Leach, 1815) | Water scavenger beetles | 1 | Species | Taxom |
| Heloridae Förster, 1856 | Helorid wasps | 11 | Species | Taxom |
| Hemerobiidae Latreille, 1802 | Brown Lacewing | 4 | Species | Taxom |
| Hemeroscopidae Pritykina, 1977 | | 2 | Species | Taxom |
| Hemiphlebiidae Fraser, 1960 | Ancient greenling | 6 | Species | Taxom |
| Heptageniidae Needham, 1901 | Flat-Bodied Up-Wings Heptageniidae | 1 | Species | Taxom |
| Hesperiidae Latreille, 1809 | Skipper | 2 | Species | Taxom |
| Heteroceridae MacLeay, 1825 | Mud beetles | 2 | Species | Taxom |
| Hexagenitidae Lameere, 1917 | | 15 | Species | Taxom |
| Hilarimorphidae Hendel, 1936 | Hilarimorphid flies | 1 | Species | Taxom |
| Hispanocaderidae Golub, Popov..., 2012 | | 1 | Species | Taxom |
| Histeridae Gyllenhal, 1808 | Clown beetle | 1 | Species | Taxom |
| Hodgsonicoccidae Vea & Grimaldi, 2015 | | 1 | Species | Taxom |
| Hodotermitidae Desneux, 1904 | Harvester termites | 5 | Species | Taxom |
| Hoploridiidae Popov & Shch..., 1991 | | 1 | Species | Taxom |
| Huaxiasciaritidae (Hong, 2002) | | 2 | Species | Taxom |
| Hybosoridae Erichson, 1847 | Pill scarab beetles | 11 | Species | Taxom |
| Hydraenidae Mulsant, 1844 | Cascade Beetles | 1 | Species | Taxom |
| Hydrometridae Billberg, 1820 | Marsh treader | 3 | Species | Taxom |
| Hydrophilidae Latreille, 1802 | Silver Water Beetles | 35 | Species | Taxom |
| Hydroscaphidae LeConte, 1874 | Skiff beetle | 1 | Species | Taxom |
| Hylicellidae Evans, 1956 | | 4 | Species | Taxom |
| Ichneumonidae Latreille, 1802 | Ichneumon flies | 35 | Species | Taxom |
| Ichneumonomimidae Rasnitsyn, 1975 | | 2 | Species | Taxom |
| Ignotingidae Zhang, Golub..., 2005 | | 1 | Species | Taxom |
| Ipsviciidae Tillyard, 1919 | | 1 | Species | Taxom |
| Ironomyiidae McAlpine & M..., 1966 | Ironic flies | 17 | Species | Taxom |
| Isophlebiidae Handlirsch, 1908 | | 4 | Species | Taxom |
| Ithonidae Newman, 1838 | Ithonid lacewings | 2 | Species | Taxom |
| Ithyceridae (Schönherr, 1826) | New York weevil | 3 | Species | Taxom |
| Jascopidae Hamilton, 1971 | | 6 | Species | Taxom |
| Jezzinothripidae zur Strassen, 1973 | | 2 | Species | Taxom |
| Juraheterophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Kalligrammatidae Handlirsch, 1906 | | 18 | Species | Taxom |
| Kalotermitidae Froggatt, 1897 | Dampwood termites | 1 | Species | Taxom |
| Karabasiidae Popov, 1985 | | 1 | Species | Taxom |
| Kateretidae Kirkby, 1837 | Pollen Beetles | 1 | Species | Taxom |
| Keroplatidae Rondani, 1856 | Fungus gnats | 2 | Species | Taxom |
| Khutelchalcididae Rasnitsyn & al., 2004 | | 1 | Species | Taxom |
| Kobdocoridae Popov, 1986 | | 1 | Species | Taxom |
| Labiduridae Verhoeff, 1902 | Long-horned earwig | 2 | Species | Taxom |
| Lalacidae Hamilton, 1990 | | 17 | Species | Taxom |
| Lasiosynidae Kirejtshuk, ..., 2010 | | 14 | Species | Taxom |
| Latridiidae Erichson, 1842 | Minute brown scavenger beetle | 3 | Species | Taxom |
| Lebanaphididae Heie, 2000 | | 2 | Species | Taxom |
| Lebanococcidae Koteja & Azar, 2008 | | 1 | Species | Taxom |
| Leiodidae Fleming, 1821 | Round fungus beetles | 1 | Species | Taxom |
| Lepidostomatidae Ulmer, 1903 | Bizarre Caddisflies | 2 | Species | Taxom |
| Leptoceridae Leach, 1815 | Long Horned caddisflies | 2 | Species | Taxom |
| Leptophlebiidae Banks, 1900 | Leptophlebiids | 9 | Species | Taxom |
| Leuctridae Klapálek, 1905 | Needle Or Willow Stoneflies | 1 | Species | Taxom |
| Liadopsyllidae Martynov, 1927 | | 2 | Species | Taxom |
| Liadytidae Ponomarenko, 1977 | | 4 | Species | Taxom |
| Liassogomphidae Tillyard, 1935 | | 1 | Species | Taxom |
| Libellulidae Rambur, 1842 | Chasers | 2 | Species | Taxom |
| Liberiblattinidae Vrsansky, 2002 | | 5 | Species | Taxom |
| Ligavenidae Hamilton, 1992 | | 1 | Species | Taxom |
| Limnephilidae Kolenati, 1848 | Northern caddisflies | 71 | Species | Taxom |
| Limoniidae (Speiser, 1909) | Craneflies | 12 | Species | Taxom |
| Lithoscarabaeidae Nikolajev, 1992 | | 3 | Species | Taxom |
| Liupanshaniidae Bechly & al, 2001 | | 6 | Species | Taxom |
| Locustopsidae Handlirsch, 1906 | | 28 | Species | Taxom |
| Lonchopteridae Curtis, 1839 | Pointed-wing flies | 2 | Species | Taxom |
| Lucanidae Latreille, 1804 | Stag Beetle | 12 | Species | Taxom |
| Lygaeidae Schilling, 1829 | Chinch bugs | 6 | Species | Taxom |
| Lygistorrhinidae Hendel, 1936 | Long beaked fungus gnat | 1 | Species | Taxom |
| Lygobiidae Mitchell, 1908 | | 1 | Species | Taxom |
| Lymexylidae Fleming, 1821 | Ship-timber beetle | 1 | Species | Taxom |
| Magnathemidae Bechly, 2010 | | 1 | Species | Taxom |
| Magnocoleidae Hong, 1998 | | 1 | Species | Taxom |
| Maimetshidae (Rasnitsyn, 1975) | | 7 | Species | Taxom |
| Mantispidae Leach, 1815 | Mantid lacewings | 4 | Species | Taxom |
| Mastotermitidae Desneux, 1904 | | 2 | Species | Taxom |
| Matsucoccidae Morrison, 1927 | Pine bark scales | 3 | Species | Taxom |
| Megachilidae Schenk, 1860 | And Resin Bees | 2 | Species | Taxom |
| Megalodontesidae Konow, 1897 | | 5 | Species | Taxom |
| Megalyridae Schletterer, 1889 | Megalyrid wasps | 13 | Species | Taxom |
| Megaphlebiidae Bechly, 2010 | | 1 | Species | Taxom |
| Meinertellidae Verhoeff, 1910 | Hump-backed Bristletails | 1 | Species | Taxom |
| Melandryidae Leach, 1815 | False Darkling Beetle | 2 | Species | Taxom |
| Melanthripidae Bagnall, 1913 | | 2 | Species | Taxom |
| Meloidae Gyllenhal, 1810 | Blister Beetle | 1 | Species | Taxom |
| Mesoblattinidae Handlirsch, 1906 | | 62 | Species | Taxom |
| Mesochlorogomphidae Fleck & al., 2008 | | 2 | Species | Taxom |
| Mesochrysopidae Handlirsch, 1906 | | 31 | Species | Taxom |
| Mesogereonidae Tillyard, 1921 | | 1 | Species | Taxom |
| Mesoleuctridae Sinitshenkova, 1982 | | 1 | Species | Taxom |
| Mesolygaeidae Zhang, 1991 | | 2 | Species | Taxom |
| Mesopentacoridae Popov, 1968 | | 2 | Species | Taxom |
| Mesopsychidae Tillyard, 1917 | | 6 | Species | Taxom |
| Mesoraphidiidae Martynov, 1925 | | 56 | Species | Taxom |
| Mesosciophilidae Rohdendorf, 1946 | | 10 | Species | Taxom |
| Mesoserphidae Kozlov, 1970 | | 7 | Species | Taxom |
| Mesoveliidae Douglas and ..., 1867 | Pond treaders | 5 | Species | Taxom |
| Mesuropetalidae Bechly, 1996 | | 3 | Species | Taxom |
| Mickoleitiidae Staniczek, B..., 2011 | | 1 | Species | Taxom |
| Micromalthidae Barber, 1913 | Micromalthid beetles | 1 | Species | Taxom |
| Micropterigidae Herrich-Schä..., 1855 | Mandibulate Archaic Moths | 4 | Species | Taxom |
| Mimarachnidae Shcherbakov, 2007 | | 5 | Species | Taxom |
| Miridae Hahn, 1831 | Capsid bugs | 2 | Species | Taxom |
| Monotomidae Laporte, 1840 | Minute Clubbed Beetles | 5 | Species | Taxom |
| Mordellidae Latreille, 1802 | Pintail beetles | 7 | Species | Taxom |
| Mycetophilidae Newman, 1834 | Fungus Gnat | 56 | Species | Taxom |
| Mydidae Bezzi, 1903 | Mydas flies | 1 | Species | Taxom |
| Myerslopiidae Evans, 1957 | | 7 | Species | Taxom |
| Mylacridae Scudder, 1886 | | 1 | Species | Taxom |
| Mymaridae Haliday, 1833 | Fairflies | 3 | Species | Taxom |
| Mymarommatidae Debauche, 1948 | False fairy wasp | 1 | Species | Taxom |
| Myrmecophilidae Saussure, 1874 | Ant cricket | 1 | Species | Taxom |
| Myrmeleontidae Latreille, 1802 | Ant lions | 21 | Species | Taxom |
| Nannochoristidae Tillyard, 1917 | | 1 | Species | Taxom |
| Nannogomphidae Bechly, 1996 | | 1 | Species | Taxom |
| Naucoridae Leach, 1815 | Creeping water bug | 8 | Species | Taxom |
| Neazoniidae Szwedo, 2007 | | 4 | Species | Taxom |
| Necrotauliidae Handlirsch, 1906 | | 13 | Species | Taxom |
| Nemestrinidae Macquart, 1834 | Tangle-veined flies | 8 | Species | Taxom |
| Nemonychidae Bedel, 1882 | Nemonychid weevils | 47 | Species | Taxom |
| Nemopteridae Rambur, 1842 | Spoonwings | 3 | Species | Taxom |
| Nemouridae Newman, 1853 | Brown stoneflies | 2 | Species | Taxom |
| Neoblattariae Scudder, 1886 | | 2 | Species | Taxom |
| Ningxiapsychidae Hong & Li, 2004 | | 1 | Species | Taxom |
| Nitidulidae Latreille, 1802 | Nitidules | 5 | Species | Taxom |
| Nodalulaidae Lin, Huang &..., 2007 | | 1 | Species | Taxom |
| Nothomacromiidae (Carle, 1995) | | 1 | Species | Taxom |
| Notonectidae Latreille, 1802 | Back Swimmers | 5 | Species | Taxom |
| Nymphalidae Rafinesque, 1815 | Admirals | 1 | Species | Taxom |
| Nymphidae Rambur, 1842 | Split-footed lacewing | 13 | Species | Taxom |
| Ochodaeidae Mulsant & Rey, 1870 | Sand-loving scarab beetle | 3 | Species | Taxom |
| Ochteridae Kirkaldy, 1906 | Velvety shore bug | 4 | Species | Taxom |
| Oecanthoperlidae Storozhenko, 1988 | | 1 | Species | Taxom |
| Oedemeridae Latreille, 1810 | False Blister Beetle | 2 | Species | Taxom |
| Oligoneuriidae Ulmer, 1914 | Brushleg Mayflies | 2 | Species | Taxom |
| Ommatidae Sharp & Muir, 1912 | | 81 | Species | Taxom |
| Opetiidae Rondani, 1856 | Flat-footed flies | 4 | Species | Taxom |
| Ortheziidae Green, 1896 | Ensign coccids | 1 | Species | Taxom |
| Orthophlebiidae Handlirsch, 1906 | | 14 | Species | Taxom |
| Osmylidae Leach, 1815 | Giant lacewings | 16 | Species | Taxom |
| Oviparosiphidae Shaposhnikov, 1979 | | 19 | Species | Taxom |
| Pachymeridiidae Handlirsch, 1906 | | 19 | Species | Taxom |
| Pachyneuridae Schiner, 1864 | Dark-winged fungus gnats | 1 | Species | Taxom |
| Pachytroctidae Enderlein, 1911 | Thick Barklice | 1 | Species | Taxom |
| Palaeoaphididae Richards, 1966 | | 15 | Species | Taxom |
| Palaeoleontidae Martins-Neto, 1992 | Ant lion | 14 | Species | Taxom |
| Palaeontinidae Handlirsch, 1906 | Giant cicadas | 25 | Species | Taxom |
| Palingeniidae Albarda, 1888 | Riverbed Burrower Mayflies | 1 | Species | Taxom |
| Pamphiliidae Cameron, 1890 | Leaf-rolling sawflies | 1 | Species | Taxom |
| Panfiloviidae Makarkin, 1990 | | 1 | Species | Taxom |
| Papilionidae Latreille, 1802 | Apollos | 1 | Species | Taxom |
| Parandrexidae Kirejtshuk, 1994 | | 1 | Species | Taxom |
| Paraxymyiidae Rohdendorf, 1946 | Paxylommatid wasps | 1 | Species | Taxom |
| Paroryssidae Martynov, 1925 | | 2 | Species | Taxom |
| Pediciidae Osten Sacken, 1860 | Hairy-Eyed Crane Flies | 3 | Species | Taxom |
| Pelecinidae Haliday, 1839 | Ancestral And Modern Pelecinid Wasps | 42 | Species | Taxom |
| Pennygullaniidae Koteja & Azar, 2008 | | 1 | Species | Taxom |
| Pentatomidae Leach, 1815 | Lesser shield bugs | 1 | Species | Taxom |
| Peradeniidae Naumann & Ma..., 1985 | | 1 | Species | Taxom |
| Pereboriidae Zalessky, 1930 | | 2 | Species | Taxom |
| Perforissidae Shcherbakov, 2007 | | 4 | Species | Taxom |
| Perissommatidae Colless, 1962 | | 2 | Species | Taxom |
| Perlariopseidae N.D. Siniche..., 1985 | | 4 | Species | Taxom |
| Perlidae (Latreille, 1802) | Common stoneflies | 4 | Species | Taxom |
| Perlodidae Klapálek, 1912 | Perlodid stoneflies | 1 | Species | Taxom |
| Permelytridae Tillyard, 1931 | | 1 | Species | Taxom |
| Permochoristidae Tillyard, 1918 | | 2 | Species | Taxom |
| Permocupedidae Martynov, 1933 | | 1 | Species | Taxom |
| Petaluridae Needham, 1903 | Grayback dragonfly | 4 | Species | Taxom |
| Phasmomimidae Sharov, 1968 | | 10 | Species | Taxom |
| Phlaeothripidae Uzel, 1895 | Thrips | 1 | Species | Taxom |
| Phoridae Curtis, 1833 | Coffin Flies | 3 | Species | Taxom |
| Phryganeidae (Leach, 1815) | Giant casemaker | 4 | Species | Taxom |
| Phyloblattidae Schneider, 1983 | | 1 | Species | Taxom |
| Pieridae Duponchel, 1835 | Brimstones | 1 | Species | Taxom |
| Platyperlidae Sinitshenkova, 1982 | | 1 | Species | Taxom |
| Platypezidae Fallen, 1815 | Flat footed flies | 11 | Species | Taxom |
| Pleciofungivoridae Rohdendorf, 1946 | | 7 | Species | Taxom |
| Pleciomimidae Rodendorf, 1949 | | 3 | Species | Taxom |
| Plectrotarsidae Mosely, 1953 | | 1 | Species | Taxom |
| Pleocomidae LeConte, 1861 | Rain beetle | 3 | Species | Taxom |
| Podoscirtidae Saussure, 1878 | | 3 | Species | Taxom |
| Polycentropodidae Ulmer, 1903 | Tube Maker Caddisflies | 2 | Species | Taxom |
| Polymitarcyidae Banks, 1900 | Pale Burrower Mayflies | 2 | Species | Taxom |
| Polyphagidae (Walker, 1868) | Desert Cockroaches | 1 | Species | Taxom |
| Pompilidae Latreille, 1805 | Pompilid wasps | 9 | Species | Taxom |
| Pothamantidae MeCafferty, 1990 | | 1 | Species | Taxom |
| Praeaulacidae Rasnitsyn, 1972 | | 13 | Species | Taxom |
| Praeichneumonidae Rasnitsyn, 1983 | | 5 | Species | Taxom |
| Praesiricidae Rasnitsyn, 1968 | | 14 | Species | Taxom |
| Prezottophlebiidae Martins-Neto, 2007 | | 1 | Species | Taxom |
| Primipentatomidae Yao, Cai, Ri..., 2013 | | 5 | Species | Taxom |
| Procercopidae Handlirsch, 1906 | | 9 | Species | Taxom |
| Procramptonomyiidae Kovalev, 1985 | | 2 | Species | Taxom |
| Proctotrupidae Latreille, 1802 | Proctotrupid wasps | 15 | Species | Taxom |
| Progobiaeshnidae Bechly & al, 2001 | | 6 | Species | Taxom |
| Progonocimicidae Handlirsch, 1906 | | 11 | Species | Taxom |
| Prohemerobiidae Handlirsch, 1906 | | 3 | Species | Taxom |
| Prophalangopsidae Saussure, 1878 | Grigs | 33 | Species | Taxom |
| Prosbolidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Proscopiidae Serville, 1838 | Jumping sticks | 1 | Species | Taxom |
| Prostenophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Protapioceridae Ren, 1998 | | 4 | Species | Taxom |
| Protendipedidae Rohdendorf, 1962 | | 1 | Species | Taxom |
| Proterogomphidae Bechly, 1996 | | 12 | Species | Taxom |
| Protodiplatyidae Martynov, 1925 | | 6 | Species | Taxom |
| Protomphralidae Rohdendorf, 1957 | | 2 | Species | Taxom |
| Protomyrmeleontidae Handlirsch, 1906 | | 2 | Species | Taxom |
| Protoneuridae Tillyard, 1917 | Bambootails | 1 | Species | Taxom |
| Protopleciidae Rohdendorf, 1946 | | 5 | Species | Taxom |
| Protopsyllidiidae Becker-Migdi..., 1960 | | 3 | Species | Taxom |
| Protorhyphidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Pseudonerthridae Martins-Neto..., 2005 | | 1 | Species | Taxom |
| Pseudopulicidae Gao, Shih & Ren, 2012 | | 3 | Species | Taxom |
| Pseudosiricidae Handlirsch, 1908 | | 1 | Species | Taxom |
| Psychodidae Newman, 1834 | Drain flies | 20 | Species | Taxom |
| Psychopsidae Handlirsch, 1906 | Silky lacewing | 24 | Species | Taxom |
| Psyllipsocidae Enderlein, 1903 | Cave Barklice | 1 | Species | Taxom |
| Ptinidae Latreille, 1802 | Death-watch and Spider Beetles | 1 | Species | Taxom |
| Ptismidae Kirejtshuk &..., 2016 | | 1 | Species | Taxom |
| Ptychopteridae Osten Sacken, 1862 | Phantom crane flies | 19 | Species | Taxom |
| Putoidae Beardsley, 1969 | Giant mealybugs | 1 | Species | Taxom |
| Pygidicranidae (Verhoeff, 1902) | | 4 | Species | Taxom |
| Pyrochroidae Latreille, 1807 | Cardinal beetles | 1 | Species | Taxom |
| Pyrrhocoridae Dohrn, 1859 | Cotton stainers | 1 | Species | Taxom |
| Radiophronidae Ortega-Blanc..., 2010 | | 2 | Species | Taxom |
| Rafaelianidae Engel & Nel, 2017 | | 2 | Species | Taxom |
| Raphidiidae Latreille, 1810 | Raphidiid snakeflies | 1 | Species | Taxom |
| Raphidiomimidae Vishniakova, 1973 | | 14 | Species | Taxom |
| Raphoglidae Béthoux & al., 2002 | | 1 | Species | Taxom |
| Rasnitsynaphididae Homan & Wegi..., 2011 | | 3 | Species | Taxom |
| Rhachiberothidae Tjeder, 1959 | Thorny lacewing | 5 | Species | Taxom |
| Rhagionemestriidae Ussatchov, 1968 | | 4 | Species | Taxom |
| Rhagionidae Latreille, 1802 | Snipe flies | 23 | Species | Taxom |
| Rhipiphoridae Gemminger & ..., 1870 | Hump back beetles | 1 | Species | Taxom |
| Rhopalidae Amyot & Serv..., 1843 | Rhopalid Bugs | 1 | Species | Taxom |
| Rhopalosomatidae Ashmead, 1896 | Rhopalosomatid wasps | 1 | Species | Taxom |
| Roeslerianidae Martins-Neto, 1997 | | 1 | Species | Taxom |
| Roproniidae Bradley, 1905 | Roproniid wasps | 5 | Species | Taxom |
| Rudiaeschnidae Bechly, Nel,..., 2001 | | 2 | Species | Taxom |
| Saldidae Amyot and Se..., 1843 | Shore bug | 14 | Species | Taxom |
| Santanmantidae Grimaldi, 2003 | | 1 | Species | Taxom |
| Sapygidae Latreille, 1810 | Club-horned wasps | 1 | Species | Taxom |
| Saurophthiridae Ponomarenko, 1986 | | 2 | Species | Taxom |
| Scarabaeidae Latreille, 1802 | Dung beetles | 56 | Species | Taxom |
| Scatopsidae Newman, 1834 | Dung midges | 1 | Species | Taxom |
| Scelionidae Haliday, 1839 | Scelionid wasps | 15 | Species | Taxom |
| Schizophoridae Ponomarenko, 1968 | | 3 | Species | Taxom |
| Schizopodidae (LeConte, 1859) | False Jewel Beetles | 1 | Species | Taxom |
| Schizopteridae Reuter, 1891 | Jumping ground bugs | 5 | Species | Taxom |
| Sclerogibbidae Ashmead, 1902 | Sclerogibbid wasp | 1 | Species | Taxom |
| Scolebythidae Evans, 1963 | Scolebythid wasps | 6 | Species | Taxom |
| Scoliidae Leach, 1815 | Mammoth wasps | 15 | Species | Taxom |
| Scraptiidae Mulsant, 1856 | Antlike leaf beetles | 2 | Species | Taxom |
| Scydmaenidae (Leach, 1815) | Ant-like stone beetles | 1 | Species | Taxom |
| Scytinopteridae Handlirsch, 1906 | | 2 | Species | Taxom |
| Septiventeridae Bai & al., 2013 | | 1 | Species | Taxom |
| Sepulcidae Rasnitsyn, 1968 | | 29 | Species | Taxom |
| Serendipidae Evenhuis, 1994 | | 3 | Species | Taxom |
| Serpentivenidae Shcherbakov, 1984 | | 2 | Species | Taxom |
| Serphitidae Brues, 1937 | | 4 | Species | Taxom |
| Sesiidae Boisduval, 1828 | Clear Wings | 1 | Species | Taxom |
| Shaposhnikoviidae Kononova, 1976 | | 6 | Species | Taxom |
| Siberioperlidae Sinitshenkova, 1983 | | 8 | Species | Taxom |
| Silphidae Latreille, 1807 | Burying And Carrion Beetles | 0 | Species | Taxom |
| Silvanidae Kirby, 1837 | Flat bark beetles | 1 | Species | Taxom |
| Simuliidae Newman, 1834 | Black flies | 4 | Species | Taxom |
| Sinaphididae Zhang & al., 1989 | | 2 | Species | Taxom |
| Sinoalidae Wang & Szwedo, 2012 | | 1 | Species | Taxom |
| Sinosiricidae Hong You-Chong, 1975 | | 1 | Species | Taxom |
| Siphlonuridae Banks, 1900 | Primitive Minnow Mayflies | 8 | Species | Taxom |
| Siricidae Billberg, 1820 | Horntail | 7 | Species | Taxom |
| Socialidae Vrsansky, 2010 | | 1 | Species | Taxom |
| Sonidae Pritykina, 1986 | | 1 | Species | Taxom |
| Spathiopterygidae Engel & Orte..., 2013 | | 3 | Species | Taxom |
| Sphaeropsocidae Kolbe, 1883 | | 2 | Species | Taxom |
| Sphecidae Latreille, 1802 | Digger & Sand wasps | 1 | Species | Taxom |
| Sphenophlebiidae Bechly, 1997 | | 1 | Species | Taxom |
| Sphindidae Jacquelin du..., 1860 | Cryptic slime mold beetle | 5 | Species | Taxom |
| Staphylinidae Lameere, 1900 | Rove beetles | 83 | Species | Taxom |
| Steingeliidae Morrison, 1927 | | 2 | Species | Taxom |
| Stenophlebiidae Needham, 1903 | | 8 | Species | Taxom |
| Stigmaphronidae Kozlov, 1975 | Stigmaphronid wasps | 11 | Species | Taxom |
| Stratiomyidae Latreille, 1802 | Soldier flies | 4 | Species | Taxom |
| Susumaniidae Gorochov, 1988 | | 4 | Species | Taxom |
| Synlestidae Tillyard, 1917 | Malachite | 1 | Species | Taxom |
| Synteliidae Lewis, 1882 | | 6 | Species | Taxom |
| Syrphidae Latreille, 1802 | Drone flies | 2 | Species | Taxom |
| Szelegiewicziidae Wegierek, 1989 | | 1 | Species | Taxom |
| Tabanidae Latreille, 1802 | Breeze flies | 8 | Species | Taxom |
| Tachinidae (Robineau-Des..., 1830) | Bristle Flies | 0 | Species | Taxom |
| Taeniopterygidae Klapálek, 1905 | Taeniopterygid winter stoneflies | 5 | Species | Taxom |
| Tajmyraphididae Kononova, 1975 | | 1 | Species | Taxom |
| Taldycupedidae Rohdendorf, 1961 | | 3 | Species | Taxom |
| Tanyderidae Alexander, 1919 | Primitive crane flies | 2 | Species | Taxom |
| Tarsophlebiidae Handlirsch, 1906 | | 5 | Species | Taxom |
| Tenebrionidae Latreille, 1802 | Darkling Beetle | 4 | Species | Taxom |
| Tenthredinidae Latreille, 1804 | Common sawflies | 3 | Species | Taxom |
| Termopsidae Grassé, 1949 | Damp wood termite | 2 | Species | Taxom |
| Tethepomyiidae Grimaldi & A..., 2008 | | 1 | Species | Taxom |
| Tetratomidae Billberg, 1820 | Polypore fungus beetle | 1 | Species | Taxom |
| Tetrigidae Rambur, 1838 | Groundhoppers | 2 | Species | Taxom |
| Tettigarctidae Distant, 1905 | Hairy cicada | 6 | Species | Taxom |
| Tettigoniidae Krauss, 1902 | Bush crickets | 2 | Species | Taxom |
| Thaumatoneuridae Fraser, 1957 | | 4 | Species | Taxom |
| Thripidae Stevens, 1829 | Common thrips | 4 | Species | Taxom |
| Throscidae Laporte, 1840 | False metallic wood-boring beetles | 2 | Species | Taxom |
| Thynnidae Shuckard, 1841 | Thynnid Wasps | 1 | Species | Taxom |
| Tingidae Laporte, 1832 | Lace bug | 3 | Species | Taxom |
| Tipulidae Latreille, 1802 | Crane Flies | 18 | Species | Taxom |
| Torephemeridae Sinitshekova, 1989 | | 1 | Species | Taxom |
| Torirostratidae Yao, Cai, Sh..., 2014 | | 1 | Species | Taxom |
| Torrirostratidae Yao & al., 2014 | | 1 | Species | Taxom |
| Trachypachidae C. G. Thomson, 1857 | False ground beetle | 23 | Species | Taxom |
| Trichoceridae Rondani, 1841 | Winter Crane Flies | 9 | Species | Taxom |
| Tridactylidae Saussure, 1874 | Pygmy mole cricket | 6 | Species | Taxom |
| Trigonalidae (Cresson, 1887) | Trigonalid sawflies | 3 | Species | Taxom |
| Trigonalyidae | | 1 | Species | Taxom |
| Trigonidiidae (Saussure, 1870) | And Ground Crickets | 1 | Species | Taxom |
| Trogidae (MacLeay, 1819) | Gnawer beetles | 10 | Species | Taxom |
| Trogossitidae Latreille, 1802 | Bark gnawing beetle | 13 | Species | Taxom |
| Tryonicidae McKittrick &..., 1965 | | 1 | Species | Taxom |
| Ulyanidae (Zherikhin, 1993) | | 1 | Species | Taxom |
| Umenocoleidae Chen & Tian, 1973 | | 14 | Species | Taxom |
| Undopterigidae (Kozlov, 1988) | | 1 | Species | Taxom |
| Valdicorduliidae Bechly, 1996 | | 1 | Species | Taxom |
| Veliidae Amyot & Serv..., 1843 | Broad-shouldered bugs | 1 | Species | Taxom |
| Venicoridae Yao, Ren & Cai, 2012 | | 4 | Species | Taxom |
| Vermileonidae Williston, 1886 | Wormlion | 2 | Species | Taxom |
| Vespidae Leach, 1815 | And Allies | 8 | Species | Taxom |
| Vetanthocoridae Yao, Cai & Ren, 2006 | | 14 | Species | Taxom |
| Vitimiidae Sharov, 1968 | | 3 | Species | Taxom |
| Vitimotauliidae Sukatsheva, 1968 | | 25 | Species | Taxom |
| Volitorididae Hong, 1982 | | 1 | Species | Taxom |
| Xiphopteridae Sharov, 1968 | | 1 | Species | Taxom |
| Xyelidae Newman, 1835 | Sawfly | 32 | Species | Taxom |
| Xyelotomidae Rasnitsyn, 1968 | | 11 | Species | Taxom |
| Xyelydidae Rasnitsyn, 1968 | | 8 | Species | Taxom |
| Xylococcidae (Pergrande, 1898) | | 1 | Species | Taxom |
| Xylomyidae Verrall, 1901 | Wood soldier flies | 1 | Species | Taxom |
| Yuripopovinidae Azar & al., 2011 | | 1 | Species | Taxom |
| Zhangsolvidae Nagatomi & Yang, 1998 | | 5 | Species | Taxom |
| Zorotypidae Silvestri, 1913 | Angel insects | 1 | Species | Taxom |
| Zygaenidae Latreille, 1809 | Burnet Forester | 1 | Species | Taxom |
