| Aeschnidiidae Needham, 1903 | Small darner | 32 | Species | Taxom |
| Aeshnidae Rambur, 1842 | Darners | 187 | Species | Taxom |
| Aktassiidae Pritykina, 1968 | | 6 | Species | Taxom |
| Ameletidae McCafferty, 1991 | Combmouthed Minnow Mayflies | 2 | Species | Taxom |
| Ameletopsidae Edmunds, 1957 | | 1 | Species | Taxom |
| Ametropodidae Bengtsson, 1913 | Sand minnow mayflies | 3 | Species | Taxom |
| Amphipterygidae Selys, 1853 | | 3 | Species | Taxom |
| Araripelibellulidae Bechly, 1996 | | 2 | Species | Taxom |
| Archithemistidae Tillyard, 1917 | | 2 | Species | Taxom |
| Arthropleidae Balthasar, 1937 | Flatheaded Mayflies | 3 | Species | Taxom |
| Asiopteridae Pritykina, 1968 | | 2 | Species | Taxom |
| Australiphemeridae McCafferty, 1991 | | 1 | Species | Taxom |
| Babidae Kluge, Godun..., 2006 | | 1 | Species | Taxom |
| Baetidae Leach, 1815 | Mayflies | 181 | Species | Taxom |
| Baetiscidae Banks, 1900 | Armored Mayflies | 3 | Species | Taxom |
| Bechalidae Ilger & Brau..., 2012 | | 1 | Species | Taxom |
| Bechlyidae Jarzembowski..., 2002 | | 1 | Species | Taxom |
| Behningiidae Motas & Bacesco, 1937 | Tuskless burrowing mayflies | 1 | Species | Taxom |
| Bojophlebiidae Kukalova-Peck, 1985 | | 1 | Species | Taxom |
| Bolcacorduliidae Gentilini, 2002 | | 1 | Species | Taxom |
| Bolcathoridae Gentilini, 2002 | | 1 | Species | Taxom |
| Caenidae Newman, 1853 | Small square-gill mayflies | 42 | Species | Taxom |
| Calopterygidae Selys, 1850 | Broad-winged damselflies | 35 | Species | Taxom |
| Campterophlebiidae Handlirsch, 1920 | | 7 | Species | Taxom |
| Campylopteridae Handlirsch, 1906 | | 1 | Species | Taxom |
| Chlorocyphidae Cowley, 1937 | Jewel damselfly | 8 | Species | Taxom |
| Chlorogomphidae Needham, 1903 | | 1 | Species | Taxom |
| Chlorolestidae (Fraser, 1960) | | 4 | Species | Taxom |
| Coenagrionidae Kirby, 1890 | Narrow-winged damselflies | 223 | Species | Taxom |
| Coloburiscidae Edmunds, 1963 | | 1 | Species | Taxom |
| Cordulegasteridae | | 3 | Species | Taxom |
| Cordulegastridae Calvert, 1893 | Biddie | 18 | Species | Taxom |
| Corduliidae Selys-Longch..., 1850 | Baskettails | 85 | Species | Taxom |
| Cretacoenagrionidae Bechly, 1996 | | 1 | Species | Taxom |
| Cretapetaluridae Bechly, 1996 | | 1 | Species | Taxom |
| Cymatophlebiidae Handlirsch, 1906 | | 12 | Species | Taxom |
| Dicteriadidae Selys, 1853 | Barelegs | 1 | Species | Taxom |
| Enigmaeshnidae Nel, Neraude..., 2008 | | 1 | Species | Taxom |
| Eosagrionidae Handlirsch, 1934 | | 1 | Species | Taxom |
| Epallagidae Needham, 1903 | | 6 | Species | Taxom |
| Ephemerellidae (Klapálek, 1909) | Blue-Winged Olive Ephemerellidae | 47 | Species | Taxom |
| Ephemeridae Leach, 1817 | Burrowing mayflies | 29 | Species | Taxom |
| Epiophlebiidae Muttkowski, 1911 | | 1 | Species | Taxom |
| Erasipteridae Carpenter, 1939 | | 7 | Species | Taxom |
| Eumorbaeschnidae Bechly, 1996 | | 2 | Species | Taxom |
| Euphaeidae Jacobson & B..., 1905 | Gossamerwings | 11 | Species | Taxom |
| Euthyplociidae Lestage, 1921 | | 0 | Species | Taxom |
| Gallophlebiidae Nel & al., 2015 | | 1 | Species | Taxom |
| Gomphaeschnidae Tillyard & F..., 1940 | | 6 | Species | Taxom |
| Gomphidae Rambur, 1842 | Club-tailed dragonflies | 124 | Species | Taxom |
| Hemiphlebiidae Fraser, 1960 | Ancient greenling | 3 | Species | Taxom |
| Henrotayiidae Fleck, Bechl..., 2003 | | 1 | Species | Taxom |
| Heptageniidae Needham, 1901 | Flat-Bodied Up-Wings Heptageniidae | 214 | Species | Taxom |
| Heterophlebiidae Handlirsch, 1908 | | 14 | Species | Taxom |
| Hexagenitidae Lameere, 1917 | | 8 | Species | Taxom |
| Huangiopteridae Prokop & al., 2015 | | 1 | Species | Taxom |
| Hypolestidae Fraser, 1938 | | 3 | Species | Taxom |
| Isophlebiidae Handlirsch, 1908 | | 3 | Species | Taxom |
| Isostictidae Fraser, 1955 | Narrow-wings | 5 | Species | Taxom |
| Jarmilidae Demoulin, 1970 | | 5 | Species | Taxom |
| Juracorduliidae Bechly & Ueda, 2002 | | 1 | Species | Taxom |
| Juraheterophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Kennedyidae Tillyard, 1925 | | 2 | Species | Taxom |
| Kohlwaldiidae Guthörl, 1962 | | 1 | Species | Taxom |
| Lapeyriidae Nel & al., 1999 | | 1 | Species | Taxom |
| Leptohyphidae Landa & Soldán, 1985 | Little Stout Crawler Mayflies | 5 | Species | Taxom |
| Leptophlebiidae Banks, 1900 | Leptophlebiids | 93 | Species | Taxom |
| Lestidae Calvert, 1901 | Spread-winged damselflies | 69 | Species | Taxom |
| Lestoideidae Tillyard & F..., 1938 | | 1 | Species | Taxom |
| Liassogomphidae Tillyard, 1935 | | 5 | Species | Taxom |
| Liassophlebiidae Tillyard, 1925 | Damsel-dragonflies | 12 | Species | Taxom |
| Liassostenophlebiidae Fleck & al., 2003 | | 1 | Species | Taxom |
| Libellulidae Rambur, 1842 | Chasers | 375 | Species | Taxom |
| Lithoneuridae Sroka & al., 2014 | | 1 | Species | Taxom |
| Litophlebiidae Hubbard & Riek, 1978 | | 1 | Species | Taxom |
| Liupanshaniidae Bechly & al, 2001 | | 4 | Species | Taxom |
| Lodeviidae Nel & al., 2012 | | 1 | Species | Taxom |
| Meganeuridae Handlirsch, 1906 | | 25 | Species | Taxom |
| Megapodagrionidae Tillyard, 1917 | Flatwing | 41 | Species | Taxom |
| Mesephemeridae Lameere, 1917 | | 4 | Species | Taxom |
| Mesochlorogomphidae Fleck & al., 2008 | | 2 | Species | Taxom |
| Mesoplectopteridae Demoulin, 1955 | | 1 | Species | Taxom |
| Mesuropetalidae Bechly, 1996 | | 4 | Species | Taxom |
| Misthodotidae Tillyard, 1932 | | 2 | Species | Taxom |
| Myopophlebiidae Bode, 1953 | | 7 | Species | Taxom |
| Namurotypidae Bechly, 1996 | | 1 | Species | Taxom |
| Neoephemeridae Traver, 1935 | Large square-gilled mayflies | 1 | Species | Taxom |
| Neopetaliidae Tillyard & F..., 1940 | | 0 | Species | Taxom |
| Nesameletidae (Kluge, Stude..., 1995) | | 1 | Species | Taxom |
| Oboraneuridae Zessin, 2008 | | 1 | Species | Taxom |
| Oligoneuriidae Ulmer, 1914 | Brushleg Mayflies | 23 | Species | Taxom |
| Palaeomacromiidae Petruleviciu..., 1999 | | 1 | Species | Taxom |
| Palingeniidae Albarda, 1888 | Riverbed Burrower Mayflies | 5 | Species | Taxom |
| Paralogidae Handlirsch, 1906 | | 3 | Species | Taxom |
| Parastenophlebiidae Bechly, 2005 | | 1 | Species | Taxom |
| Perilestidae Tillyard & F..., 1938 | Shortwings | 4 | Species | Taxom |
| Permagrionidae Tillyard, 1928 | | 3 | Species | Taxom |
| Permophlebiidae Nel & al., 2001 | | 1 | Species | Taxom |
| Petaluridae Needham, 1903 | Grayback dragonfly | 14 | Species | Taxom |
| Pholidoptilidae Zalessky, 1931 | | 2 | Species | Taxom |
| Piroutetiidae Nel, 1989 | | 1 | Species | Taxom |
| Platycnemididae Tillyard, 1917 | White-legged damselflies | 18 | Species | Taxom |
| Platystictidae Laidlaw, 1924 | Forest Damselflies | 4 | Species | Taxom |
| Polymitarcyidae Banks, 1900 | Pale Burrower Mayflies | 13 | Species | Taxom |
| Polythoridae Munz, 1919 | Bannerwings | 4 | Species | Taxom |
| Potamanthidae Albarda, 1888 | Hacklegill mayflies | 4 | Species | Taxom |
| Priscalestidae Wappler & Pe..., 2007 | | 1 | Species | Taxom |
| Prohemeroscopidae Bechly & Ueda, 2002 | | 2 | Species | Taxom |
| Prosopistomatidae Lameere, 1917 | | 6 | Species | Taxom |
| Prostenophlebiidae Fleck & al., 2003 | | 2 | Species | Taxom |
| Protereismatidae Lameere, 1917 | | 7 | Species | Taxom |
| Proterogomphidae Bechly, 1996 | | 2 | Species | Taxom |
| Protomyrmeleontidae Handlirsch, 1906 | | 15 | Species | Taxom |
| Protoneuridae Tillyard, 1917 | Bambootails | 13 | Species | Taxom |
| Pseudostigmatidae Tillyard, 1917 | Forest giants | 10 | Species | Taxom |
| Selenothemistidae Handlirsch, 1939 | | 2 | Species | Taxom |
| Sharephemeridae Sinitshenkova, 2002 | | 1 | Species | Taxom |
| Sieblosiidae Handlirsch, 1906 | | 17 | Species | Taxom |
| Siphlonuridae Banks, 1900 | Primitive Minnow Mayflies | 57 | Species | Taxom |
| Sphenophlebiidae Bechly, 1997 | | 6 | Species | Taxom |
| Steleopteridae Handlirsch, 1906 | | 5 | Species | Taxom |
| Stenophlebiidae Needham, 1903 | | 11 | Species | Taxom |
| Synlestidae Tillyard, 1917 | Malachite | 2 | Species | Taxom |
| Synthemidae (Tillyard, 1917) | | 6 | Species | Taxom |
| Synthemistidae Tillyard, 1917 | Southern emeralds | 1 | Species | Taxom |
| Syntonopteridae Handlirsch, 1911 | | 1 | Species | Taxom |
| Tarsophlebiidae Handlirsch, 1906 | | 3 | Species | Taxom |
| Thaumatoneuridae Fraser, 1957 | | 11 | Species | Taxom |
| Tintorinidae Krzeminski &..., 2001 | | 1 | Species | Taxom |
| Torephemeridae Sinitshekova, 1989 | | 1 | Species | Taxom |
| Toxodotidae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Triadotypidae Grauvogel & ..., 1952 | | 4 | Species | Taxom |
| Triassoephemeridae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Triassolestidae Bonaparte, 1970 | | 6 | Species | Taxom |
| Triassomanthidae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Tricorythidae Lestage, 1942 | Little stout crawler mayflies | 3 | Species | Taxom |
| Triplosobidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Urothemistidae Lieftinck, 1954 | | 1 | Species | Taxom |
| Valdicorduliidae Bechly, 1996 | | 1 | Species | Taxom |
| Vogesonymphidae Sinitshenkov..., 2005 | | 2 | Species | Taxom |
| Voltziaephemeridae Sinitshenkov..., 2005 | | 1 | Species | Taxom |
| Voltzialestidae Bechly, 1996 | | 1 | Species | Taxom |
