Phylum Arthropoda Siebold, 1848 - arthropods
   Class Insecta Linnaeus, 1758 - insects
     Subclass Pterygota Lang, 1888 - winged insects see Infraclass Pterygota Lang, 1888
       Division Exopterygota Sharp, 1899
         Order Ephemeroptera Hyatt & Arms, 1891 - mayflies
           01 Family Palingeniidae Albarda, 1888
           02 Family Oligoneuriidae Ulmer, 1914
           03 Family Ametropodidae Bengtsson, 1913
           04 Family Polymitarcidae
           05 Family Ephemeridae (Latreille, 1810) Leach, 1815
           06 Family Siphlonuridae Ulmer, 1920
           07 Family Potamanthidae Albarda, 1888
           08 Family Heptageniidae Needham, 1901
           09 Family Caenidae Newman, 1853
           10 Family Ephemerellidae Klapálek, 1909
           11 Family "Isonychidae" Burmeister, 1855
           12 Family Baetidae Leach, 1815
           13 Family Leptophlebiidae Banks, 1900