living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Uniramia Snodgrass, 1935 see Phylum Arthropoda Siebold, 1848
             Class Insecta Linnaeus, 1758 - insects
               Subclass Pterygota Lang, 1888 - winged insects see Infraclass Pterygota Lang, 1888
                 Infraclass Paleoptera - ancient winged insects see Infraclass Pterygota Lang, 1888
                   Order Ephemeroptera Hyatt & Arms, 1891 - mayflies
                     Suborder Schistonota McCafferty & Edmunds, 1979
                       Superfamily Ephemeroidea Latreille, 1810
                         1 Family Behningiidae Motas & Bacesco, 1937
                         2 Family Potamanthidae Albarda, 1888
                         3 Family Euthyplociidae
                         4 Family Polymitarcyidae Banks, 1900
                         5 Family Ephemeridae (Latreille, 1810) Leach, 1815
                         6 Family Palingeniidae Albarda, 1888