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 Pisciforma
               Superfamily Siphlonuroidea Ulmer, 1920
                 Family Metretopodidae Traver, in Needham et al., 1935
                   1 Genus Metretopus Eaton, 1901
                   2 Genus Siphloplecton Clemens, 1915