Hexapods - insects see Epiclass Hexapoda Latreille, 1825
   Class Insecta Linnaeus, 1758 - insects
     Subclass Dicondylia Haeckel, 1866
       Infraclass Pterygota Lang, 1888
         Division Ephemeroptera Hyatt & Arms, 1890
           Order Ephemeroptera Hyatt & Arms, 1891 - mayflies
             Suborder Rectracheata
               Superfamily Ephemerelloidea Klapalek, 1909
                 Family Ephemerellidae Klapálek, 1909
                   1 Genus Attenella (Edmunds, 1971)
                   2 Genus Caudatella (Edmunds, 1959) Allen, 1980
                   3 Genus Caurinella Allen, 1984
                   4 Genus Drunella Needham, 1905
                   5 Genus Ephemerella Walsh, 1862
                   6 Genus Eurylophella Tiensuu, 1935
                   7 Genus Serratella (Edmunds, 1959)
                   8 Genus Timpanoga (Needham, 1927)