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 Ephemeroidea Latreille, 1810
                 Family Polymitarcyidae Banks, 1900
                   Subfamily Campsurinae
                     Genus Tortopus Needham & Murphy, 1924