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
               1 Superfamily Leptophlebioidea Banks, 1900 see Infraorder Lanceolata
               2 Superfamily Behningioidea Motas & Bacesco, 1937 see Infraorder Palpotarsa
               3 Superfamily Ephemeroidea Latreille, 1810
               4 Superfamily Caenoidea Newman, 1853
               5 Superfamily Ephemerelloidea Klapalek, 1909