| Aenigmephemeridae Tshernova, 1968 | | 1 | Species | Taxom |
| Aeschnidiidae Needham, 1903 | Small darner | 47 | Species | Taxom |
| Aeshnidae Rambur, 1842 | Darners | 626 | Species | Taxom |
| Aktassiidae Pritykina, 1968 | | 11 | Species | Taxom |
| Allopetaliidae Cockerell, 1913 | | 2 | Species | Taxom |
| Ameletidae McCafferty, 1991 | Combmouthed Minnow Mayflies | 2 | Species | Taxom |
| Ameletopsidae Edmunds, 1957 | | 8 | Species | Taxom |
| Ametropodidae Bengtsson, 1913 | Sand minnow mayflies | 6 | Species | Taxom |
| Amphipterygidae Selys, 1853 | | 29 | Species | Taxom |
| Araripechlorogomphidae Bechly & Ueda, 2002 | | 1 | Species | Taxom |
| Araripelibellulidae Bechly, 1996 | | 8 | Species | Taxom |
| Araripephlebiidae Bechly, 1998 | | 1 | Species | Taxom |
| Archithemistidae Tillyard, 1917 | | 2 | Species | Taxom |
| Argentinalidae Petruleviciu..., 2016 | | 1 | Species | Taxom |
| Arthropleidae Balthasar, 1937 | Flatheaded Mayflies | 3 | Species | Taxom |
| Asiopteridae Pritykina, 1968 | | 16 | Species | Taxom |
| Aulertupidae Zessin & Bra..., 2010 | | 1 | Species | Taxom |
| Australiphemeridae McCafferty, 1991 | | 2 | Species | Taxom |
| Austroperilestidae Petruleviciu..., 2005 | | 1 | Species | Taxom |
| Austropetaliidae Carle & Louton, 1994 | Redspot Dragonflies | 16 | Species | Taxom |
| Babidae Kluge, Godun..., 2006 | | 1 | Species | Taxom |
| Baetidae Leach, 1815 | Mayflies | 1005 | Species | Taxom |
| Baetiscidae Banks, 1900 | Armored Mayflies | 17 | Species | Taxom |
| Batkeniidae Pritykina, 1981 | | 3 | Species | Taxom |
| Bechalidae Ilger & Brau..., 2012 | | 1 | Species | Taxom |
| Bechlyidae Jarzembowski..., 2002 | | 1 | Species | Taxom |
| Behningiidae Motas & Bacesco, 1937 | Tuskless burrowing mayflies | 2 | Species | Taxom |
| Bojophlebiidae Kukalova-Peck, 1985 | | 1 | Species | Taxom |
| Bolcacorduliidae Gentilini, 2002 | | 1 | Species | Taxom |
| Bolcathoridae Gentilini, 2002 | | 1 | Species | Taxom |
| Burmaphlebiidae Bechly & Poinar, 2013 | | 1 | Species | Taxom |
| Caenidae Newman, 1853 | Small square-gill mayflies | 228 | Species | Taxom |
| Callimokaltaniidae Zalessky, 1955 | | 1 | Species | Taxom |
| Calopterygidae Selys, 1850 | Broad-winged damselflies | 197 | Species | Taxom |
| Campterophlebiidae Handlirsch, 1920 | | 62 | Species | Taxom |
| Camptotaxineuridae Tillyard, 1937 | | 1 | Species | Taxom |
| Campylopteridae Handlirsch, 1906 | | 1 | Species | Taxom |
| Chlorocyphidae Cowley, 1937 | Jewel damselfly | 193 | Species | Taxom |
| Chlorogomphidae Needham, 1903 | | 39 | Species | Taxom |
| Chlorolestidae (Fraser, 1960) | | 42 | Species | Taxom |
| Coenagrionidae Kirby, 1890 | Narrow-winged damselflies | 1400 | Species | Taxom |
| Coloburiscidae Edmunds, 1963 | | 7 | Species | Taxom |
| Cordulegasteridae | | 5 | Species | Taxom |
| Cordulegastridae Calvert, 1893 | Biddie | 48 | Species | Taxom |
| Cordulephyidae Tillyard, 1917 | | 1 | Species | Taxom |
| Corduliidae Selys-Longch..., 1850 | Baskettails | 419 | Species | Taxom |
| Cratopetaliidae Bechly, 2010 | | 1 | Species | Taxom |
| Cretacoenagrionidae Bechly, 1996 | | 1 | Species | Taxom |
| Cretapetaluridae Bechly, 1996 | | 4 | Species | Taxom |
| Cyclothemistidae Bechly, 1996 | | 7 | Species | Taxom |
| Cymatophlebiidae Handlirsch, 1906 | | 15 | Species | Taxom |
| Daohugoulibellulidae Nel & Huang, 2015 | | 1 | Species | Taxom |
| Dicteriadidae Selys, 1853 | Barelegs | 2 | Species | Taxom |
| Ditaxineuridae Tillyard, 1926 | | 3 | Species | Taxom |
| Dysagrionidae Cockerell, 1908 | | 1 | Species | Taxom |
| Ecdyoneuridae | | 2 | Species | Taxom |
| Enigmaeshnidae Nel, Neraude..., 2008 | | 1 | Species | Taxom |
| Eocorduliidae Bechly, 1996 | | 1 | Species | Taxom |
| Eosagrionidae Handlirsch, 1934 | | 1 | Species | Taxom |
| Epallagidae Needham, 1903 | | 10 | Species | Taxom |
| Epeoromimidae Tshernova, 1969 | | 1 | Species | Taxom |
| Ephemerellidae (Klapálek, 1909) | Blue-Winged Olive Ephemerellidae | 259 | Species | Taxom |
| Ephemeridae Leach, 1817 | Burrowing mayflies | 104 | Species | Taxom |
| Epiophlebiidae Muttkowski, 1911 | | 4 | Species | Taxom |
| Erasipteridae Carpenter, 1939 | | 9 | Species | Taxom |
| Erichschmidtiidae Bechly, 1996 | | 3 | Species | Taxom |
| Eugeropteridae Riek, 1984 | | 3 | Species | Taxom |
| Eumorbaeschnidae Bechly, 1996 | | 2 | Species | Taxom |
| Euphaeidae Jacobson & B..., 1905 | Gossamerwings | 81 | Species | Taxom |
| Euthemistidae Pritykina, 1968 | | 3 | Species | Taxom |
| Euthyplociidae Lestage, 1921 | | 21 | Species | Taxom |
| Frenguelliidae Petruleviciu..., 2003 | | 3 | Species | Taxom |
| Fuyoidae Zhang & Kluge, 2007 | | 1 | Species | Taxom |
| Gallophlebiidae Nel & al., 2015 | | 1 | Species | Taxom |
| Gomphaeschnidae Tillyard & F..., 1940 | | 22 | Species | Taxom |
| Gomphidae Rambur, 1842 | Club-tailed dragonflies | 1048 | Species | Taxom |
| Gondvanogomphidae Bechly, 1996 | | 1 | Species | Taxom |
| Hageniidae Tillyard & F..., 1940 | | 1 | Species | Taxom |
| Heliocharitidae | | 0 | Species | Taxom |
| Hemeroscopidae Pritykina, 1977 | | 2 | Species | Taxom |
| Hemiphlebiidae Fraser, 1960 | Ancient greenling | 9 | Species | Taxom |
| Hemizygopteridae Zalessky, 1955 | | 3 | Species | Taxom |
| Henrotayiidae Fleck, Bechl..., 2003 | | 2 | Species | Taxom |
| Heptageniidae Needham, 1901 | Flat-Bodied Up-Wings Heptageniidae | 542 | Species | Taxom |
| Heterophlebiidae Handlirsch, 1908 | | 14 | Species | Taxom |
| Hexagenitidae Lameere, 1917 | | 26 | Species | Taxom |
| Huangiopteridae Prokop & al., 2015 | | 1 | Species | Taxom |
| Hypolestidae Fraser, 1938 | | 3 | Species | Taxom |
| Idionychidae Tillyard & F..., 1940 | | 1 | Species | Taxom |
| Isophlebiidae Handlirsch, 1908 | | 9 | Species | Taxom |
| Isostictidae Fraser, 1955 | Narrow-wings | 40 | Species | Taxom |
| Jarmilidae Demoulin, 1970 | | 5 | Species | Taxom |
| Juracorduliidae Bechly & Ueda, 2002 | | 1 | Species | Taxom |
| Juragomphidae Nel, Bechly,..., 2001 | | 1 | Species | Taxom |
| Juraheterophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Juralibellulidae Huang & Nel, 2007 | | 1 | Species | Taxom |
| Kaltanoneuridae Rohdendorf, 1961 | | 1 | Species | Taxom |
| Kargalotypidae Zessin, 1983 | | 1 | Species | Taxom |
| Kennedyidae Tillyard, 1925 | | 18 | Species | Taxom |
| Kirchneralidae Petruleviciu..., 2016 | | 1 | Species | Taxom |
| Kohlwaldiidae Guthörl, 1962 | | 2 | Species | Taxom |
| Lapeyriidae Nel & al., 1999 | | 1 | Species | Taxom |
| Latibasaliidae Petruleviciu..., 2004 | | 2 | Species | Taxom |
| Leptohyphidae Landa & Soldán, 1985 | Little Stout Crawler Mayflies | 168 | Species | Taxom |
| Leptophlebiidae Banks, 1900 | Leptophlebiids | 702 | Species | Taxom |
| Lestidae Calvert, 1901 | Spread-winged damselflies | 194 | Species | Taxom |
| Lestoideidae Tillyard & F..., 1938 | | 4 | Species | Taxom |
| Liadotypidae Grauvogel & ..., 1952 | | 1 | Species | Taxom |
| Liassogomphidae Tillyard, 1935 | | 6 | Species | Taxom |
| Liassophlebiidae Tillyard, 1925 | Damsel-dragonflies | 14 | Species | Taxom |
| Liassostenophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Libellulidae Rambur, 1842 | Chasers | 1337 | Species | Taxom |
| Lithoneuridae Sroka & al., 2014 | | 6 | Species | Taxom |
| Litophlebiidae Hubbard & Riek, 1978 | | 1 | Species | Taxom |
| Liupanshaniidae Bechly & al, 2001 | | 11 | Species | Taxom |
| Lodeviidae Nel & al., 2012 | | 1 | Species | Taxom |
| Luiseiidae Nel & al., 2012 | | 1 | Species | Taxom |
| Macromiidae | Cruisers | 1 | Species | Taxom |
| Magnathemidae Bechly, 2010 | | 1 | Species | Taxom |
| Meganeuridae Handlirsch, 1906 | | 51 | Species | Taxom |
| Megaphlebiidae Bechly, 2010 | | 1 | Species | Taxom |
| Megapodagrionidae Tillyard, 1917 | Flatwing | 325 | Species | Taxom |
| Mesephemeridae Lameere, 1917 | | 6 | Species | Taxom |
| Mesochlorogomphidae Fleck & al., 2008 | | 2 | Species | Taxom |
| Mesomantidiidae Tillyard, 1923 | | 1 | Species | Taxom |
| Mesoplectopteridae Demoulin, 1955 | | 1 | Species | Taxom |
| Mesuropetalidae Bechly, 1996 | | 5 | Species | Taxom |
| Misthodotidae Tillyard, 1932 | | 14 | Species | Taxom |
| Mitophlebiidae Pritykina, 1981 | | 1 | Species | Taxom |
| Myopophlebiidae Bode, 1953 | | 7 | Species | Taxom |
| Namurotypidae Bechly, 1996 | | 1 | Species | Taxom |
| Nannogomphidae Bechly, 1996 | | 1 | Species | Taxom |
| Neoephemeridae Traver, 1935 | Large square-gilled mayflies | 14 | Species | Taxom |
| Neopetaliidae Tillyard & F..., 1940 | | 1 | Species | Taxom |
| Nesameletidae (Kluge, Stude..., 1995) | | 5 | Species | Taxom |
| Nodalulaidae Lin, Huang &..., 2007 | | 1 | Species | Taxom |
| Nothomacromiidae (Carle, 1995) | | 1 | Species | Taxom |
| Oboraneuridae Zessin, 2008 | | 1 | Species | Taxom |
| Oligoneuriidae Ulmer, 1914 | Brushleg Mayflies | 107 | Species | Taxom |
| Oniscigastridae Lameere, 1917 | | 7 | Species | Taxom |
| Palaeomacromiidae Petruleviciu..., 1999 | | 4 | Species | Taxom |
| Palingeniidae Albarda, 1888 | Riverbed Burrower Mayflies | 18 | Species | Taxom |
| Paracymatophlebiidae Bechly & al, 2001 | | 1 | Species | Taxom |
| Paragonophlebiidae Nel, 2009 | | 2 | Species | Taxom |
| Paralogidae Handlirsch, 1906 | | 5 | Species | Taxom |
| Parastenophlebiidae Bechly, 2005 | | 1 | Species | Taxom |
| Paurophlebiidae Bechly, 1996 | | 6 | Species | Taxom |
| Perilestidae Tillyard & F..., 1938 | Shortwings | 23 | Species | Taxom |
| Permaeschnidae Martynov, 1931 | | 2 | Species | Taxom |
| Permagrionidae Tillyard, 1928 | | 10 | Species | Taxom |
| Permepallagidae Martynov, 1938 | | 1 | Species | Taxom |
| Permophlebiidae Nel & al., 2001 | | 2 | Species | Taxom |
| Petaluridae Needham, 1903 | Grayback dragonfly | 24 | Species | Taxom |
| Pholidoptilidae Zalessky, 1931 | | 3 | Species | Taxom |
| Piroutetiidae Nel, 1989 | | 1 | Species | Taxom |
| Platycnemididae Tillyard, 1917 | White-legged damselflies | 286 | Species | Taxom |
| Platystictidae Laidlaw, 1924 | Forest Damselflies | 237 | Species | Taxom |
| Polymitarcyidae Banks, 1900 | Pale Burrower Mayflies | 102 | Species | Taxom |
| Polytaxineuridae Tillyard, 1935 | | 1 | Species | Taxom |
| Polythoridae Munz, 1919 | Bannerwings | 64 | Species | Taxom |
| Potamanthidae Albarda, 1888 | Hacklegill mayflies | 29 | Species | Taxom |
| Pothamantidae MeCafferty, 1990 | | 1 | Species | Taxom |
| Priscalestidae Wappler & Pe..., 2007 | | 1 | Species | Taxom |
| Progobiaeshnidae Bechly & al, 2001 | | 6 | Species | Taxom |
| Prohemeroscopidae Bechly & Ueda, 2002 | | 2 | Species | Taxom |
| Prosopistomatidae Lameere, 1917 | | 35 | Species | Taxom |
| Prostenophlebiidae Fleck & al., 2003 | | 3 | Species | Taxom |
| Protereismatidae Lameere, 1917 | | 29 | Species | Taxom |
| Proterogomphidae Bechly, 1996 | | 15 | Species | Taxom |
| Protomyrmeleontidae Handlirsch, 1906 | | 26 | Species | Taxom |
| Protoneuridae Tillyard, 1917 | Bambootails | 146 | Species | Taxom |
| Pseudolestidae Kirby, 1900 | | 1 | Species | Taxom |
| Pseudostigmatidae Tillyard, 1917 | Forest giants | 25 | Species | Taxom |
| Rallidentidae Tomka & Elpers, 1991 | | 1 | Species | Taxom |
| Rudiaeschnidae Bechly, Nel,..., 2001 | | 2 | Species | Taxom |
| Selenothemistidae Handlirsch, 1939 | | 2 | Species | Taxom |
| Sharephemeridae Sinitshenkova, 2002 | | 3 | Species | Taxom |
| Sieblosiidae Handlirsch, 1906 | | 21 | Species | Taxom |
| Sinotriadophlebiidae Zheng, Nel ..., 2017 | | 1 | Species | Taxom |
| Siphlaenigmatidae Penniket, 1962 | | 11 | Species | Taxom |
| Siphlonuridae Banks, 1900 | Primitive Minnow Mayflies | 157 | Species | Taxom |
| Sphenophlebiidae Bechly, 1997 | | 6 | Species | Taxom |
| Steleopteridae Handlirsch, 1906 | | 6 | Species | Taxom |
| Stenophlebiidae Needham, 1903 | | 18 | Species | Taxom |
| Synlestidae Tillyard, 1917 | Malachite | 9 | Species | Taxom |
| Synthemidae (Tillyard, 1917) | | 32 | Species | Taxom |
| Synthemistidae Tillyard, 1917 | Southern emeralds | 11 | Species | Taxom |
| Syntonopteridae Handlirsch, 1911 | | 4 | Species | Taxom |
| Tarsophlebiidae Handlirsch, 1906 | | 10 | Species | Taxom |
| Thaumatoneuridae Fraser, 1957 | | 21 | Species | Taxom |
| Tintorinidae Krzeminski &..., 2001 | | 1 | Species | Taxom |
| Torephemeridae Sinitshekova, 1989 | | 4 | Species | Taxom |
| Toxodotidae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Triadophlebiidae Pritykina, 1981 | | 6 | Species | Taxom |
| Triadotypidae Grauvogel & ..., 1952 | | 7 | Species | Taxom |
| Triassoephemeridae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Triassolestidae Bonaparte, 1970 | | 20 | Species | Taxom |
| Triassomanthidae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Tricorythidae Lestage, 1942 | Little stout crawler mayflies | 48 | Species | Taxom |
| Triplosobidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Turanothemistidae Pritykina, 1968 | | 1 | Species | Taxom |
| Urothemistidae Lieftinck, 1954 | | 1 | Species | Taxom |
| Valdicorduliidae Bechly, 1996 | | 1 | Species | Taxom |
| Vogesonymphidae Sinitshenkov..., 2005 | | 3 | Species | Taxom |
| Voltziaephemeridae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Voltzialestidae Bechly, 1996 | | 5 | Species | Taxom |
| Xamenophlebiidae Pritykina, 1981 | | 1 | Species | Taxom |
| Zacallitidae Cockerell, 1928 | Extinct family of damselflies | 1 | Species | Taxom |
| Zygophlebiidae Pritykina, 1981 | | 5 | Species | Taxom |
