| Aeschnidiidae Needham, 1903 | Small darner | 2 | Species | Taxom |
| Aeshnidae Rambur, 1842 | Darners | 230 | Species | Taxom |
| Ameletopsidae Edmunds, 1957 | | 4 | Species | Taxom |
| Ametropodidae Bengtsson, 1913 | Sand minnow mayflies | 5 | Species | Taxom |
| Amphipterygidae Selys, 1853 | | 7 | Species | Taxom |
| Araripechlorogomphidae Bechly & Ueda, 2002 | | 1 | Species | Taxom |
| Araripelibellulidae Bechly, 1996 | | 3 | Species | Taxom |
| Araripephlebiidae Bechly, 1998 | | 1 | Species | Taxom |
| Argentinalidae Petruleviciu..., 2016 | | 1 | Species | Taxom |
| Arthropleidae Balthasar, 1937 | Flatheaded Mayflies | 2 | Species | Taxom |
| Aulertupidae Zessin & Bra..., 2010 | | 1 | Species | Taxom |
| Australiphemeridae McCafferty, 1991 | | 1 | Species | Taxom |
| Austroperilestidae Petruleviciu..., 2005 | | 1 | Species | Taxom |
| Austropetaliidae Carle & Louton, 1994 | Redspot Dragonflies | 11 | Species | Taxom |
| Baetidae Leach, 1815 | Mayflies | 477 | Species | Taxom |
| Baetiscidae Banks, 1900 | Armored Mayflies | 15 | Species | Taxom |
| Behningiidae Motas & Bacesco, 1937 | Tuskless burrowing mayflies | 1 | Species | Taxom |
| Caenidae Newman, 1853 | Small square-gill mayflies | 91 | Species | Taxom |
| Calopterygidae Selys, 1850 | Broad-winged damselflies | 92 | Species | Taxom |
| Campterophlebiidae Handlirsch, 1920 | | 1 | Species | Taxom |
| Camptotaxineuridae Tillyard, 1937 | | 1 | Species | Taxom |
| Chlorocyphidae Cowley, 1937 | Jewel damselfly | 2 | Species | Taxom |
| Chlorogomphidae Needham, 1903 | | 1 | Species | Taxom |
| Chlorolestidae (Fraser, 1960) | | 2 | Species | Taxom |
| Coenagrionidae Kirby, 1890 | Narrow-winged damselflies | 706 | Species | Taxom |
| Coloburiscidae Edmunds, 1963 | | 1 | Species | Taxom |
| Cordulegastridae Calvert, 1893 | Biddie | 19 | Species | Taxom |
| Cordulephyidae Tillyard, 1917 | | 1 | Species | Taxom |
| Corduliidae Selys-Longch..., 1850 | Baskettails | 127 | Species | Taxom |
| Cratopetaliidae Bechly, 2010 | | 1 | Species | Taxom |
| Cretapetaluridae Bechly, 1996 | | 3 | Species | Taxom |
| Dicteriadidae Selys, 1853 | Barelegs | 2 | Species | Taxom |
| Ditaxineuridae Tillyard, 1926 | | 2 | Species | Taxom |
| Epallagidae Needham, 1903 | | 4 | Species | Taxom |
| Ephemerellidae (Klapálek, 1909) | Blue-Winged Olive Ephemerellidae | 129 | Species | Taxom |
| Ephemeridae Leach, 1817 | Burrowing mayflies | 38 | Species | Taxom |
| Eugeropteridae Riek, 1984 | | 3 | Species | Taxom |
| Euphaeidae Jacobson & B..., 1905 | Gossamerwings | 1 | Species | Taxom |
| Euthyplociidae Lestage, 1921 | | 7 | Species | Taxom |
| Frenguelliidae Petruleviciu..., 2003 | | 3 | Species | Taxom |
| Gomphaeschnidae Tillyard & F..., 1940 | | 9 | Species | Taxom |
| Gomphidae Rambur, 1842 | Club-tailed dragonflies | 468 | Species | Taxom |
| Hageniidae Tillyard & F..., 1940 | | 1 | 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 | 231 | Species | Taxom |
| Hexagenitidae Lameere, 1917 | | 3 | Species | Taxom |
| Isostictidae Fraser, 1955 | Narrow-wings | 1 | Species | Taxom |
| Kennedyidae Tillyard, 1925 | | 10 | Species | Taxom |
| Kirchneralidae Petruleviciu..., 2016 | | 1 | Species | Taxom |
| Kohlwaldiidae Guthörl, 1962 | | 1 | Species | Taxom |
| Latibasaliidae Petruleviciu..., 2004 | | 2 | Species | Taxom |
| Leptohyphidae Landa & Soldán, 1985 | Little Stout Crawler Mayflies | 163 | Species | Taxom |
| Leptophlebiidae Banks, 1900 | Leptophlebiids | 327 | Species | Taxom |
| Lestidae Calvert, 1901 | Spread-winged damselflies | 69 | Species | Taxom |
| Libellulidae Rambur, 1842 | Chasers | 549 | Species | Taxom |
| Lithoneuridae Sroka & al., 2014 | | 5 | Species | Taxom |
| Liupanshaniidae Bechly & al, 2001 | | 2 | Species | Taxom |
| Luiseiidae Nel & al., 2012 | | 1 | Species | Taxom |
| Magnathemidae Bechly, 2010 | | 1 | Species | Taxom |
| Meganeuridae Handlirsch, 1906 | | 17 | Species | Taxom |
| Megaphlebiidae Bechly, 2010 | | 1 | Species | Taxom |
| Megapodagrionidae Tillyard, 1917 | Flatwing | 150 | Species | Taxom |
| Mesuropetalidae Bechly, 1996 | | 1 | Species | Taxom |
| Misthodotidae Tillyard, 1932 | | 7 | Species | Taxom |
| Neoephemeridae Traver, 1935 | Large square-gilled mayflies | 8 | Species | Taxom |
| Neopetaliidae Tillyard & F..., 1940 | | 1 | Species | Taxom |
| Nesameletidae (Kluge, Stude..., 1995) | | 2 | Species | Taxom |
| Nothomacromiidae (Carle, 1995) | | 1 | Species | Taxom |
| Oligoneuriidae Ulmer, 1914 | Brushleg Mayflies | 61 | Species | Taxom |
| Oniscigastridae Lameere, 1917 | | 1 | Species | Taxom |
| Palaeomacromiidae Petruleviciu..., 1999 | | 3 | Species | Taxom |
| Palingeniidae Albarda, 1888 | Riverbed Burrower Mayflies | 1 | Species | Taxom |
| Paralogidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Perilestidae Tillyard & F..., 1938 | Shortwings | 21 | Species | Taxom |
| Permaeschnidae Martynov, 1931 | | 1 | Species | Taxom |
| Permagrionidae Tillyard, 1928 | | 1 | Species | Taxom |
| Petaluridae Needham, 1903 | Grayback dragonfly | 5 | Species | Taxom |
| Platycnemididae Tillyard, 1917 | White-legged damselflies | 14 | Species | Taxom |
| Platystictidae Laidlaw, 1924 | Forest Damselflies | 45 | Species | Taxom |
| Polymitarcyidae Banks, 1900 | Pale Burrower Mayflies | 86 | Species | Taxom |
| Polythoridae Munz, 1919 | Bannerwings | 64 | Species | Taxom |
| Potamanthidae Albarda, 1888 | Hacklegill mayflies | 6 | Species | Taxom |
| Pothamantidae MeCafferty, 1990 | | 1 | Species | Taxom |
| Prosopistomatidae Lameere, 1917 | | 6 | Species | Taxom |
| Protereismatidae Lameere, 1917 | | 15 | Species | Taxom |
| Proterogomphidae Bechly, 1996 | | 10 | Species | Taxom |
| Protomyrmeleontidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Protoneuridae Tillyard, 1917 | Bambootails | 49 | Species | Taxom |
| Pseudostigmatidae Tillyard, 1917 | Forest giants | 20 | Species | Taxom |
| Siphlaenigmatidae Penniket, 1962 | | 3 | Species | Taxom |
| Siphlonuridae Banks, 1900 | Primitive Minnow Mayflies | 86 | Species | Taxom |
| Stenophlebiidae Needham, 1903 | | 1 | Species | Taxom |
| Synlestidae Tillyard, 1917 | Malachite | 2 | Species | Taxom |
| Syntonopteridae Handlirsch, 1911 | | 3 | Species | Taxom |
| Thaumatoneuridae Fraser, 1957 | | 11 | Species | Taxom |
| Triassolestidae Bonaparte, 1970 | | 1 | Species | Taxom |
| Tricorythidae Lestage, 1942 | Little stout crawler mayflies | 1 | Species | Taxom |
| Zacallitidae Cockerell, 1928 | Extinct family of damselflies | 1 | Species | Taxom |
