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
                 1 Family Acanthametropodidae Edmunds, 1963
                 2 Family Ameletidae McCafferty, 1991
                 3 Family Ametropodidae Bengtsson, 1913
                 4 Family Baetidae Leach, 1815
                 5 Family Metretopodidae Traver, in Needham et al., 1935
                 6 Family Siphlonuridae Ulmer, 1920