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
             .1 Family Ameletopsidae Edmunds, 1957
             .2 Family Coloburiscidae (Edmunds, 1963)
             .3 Family Dipteromimidae Kluge et al., 1995 see Subfamily Siphlonurinae Ulmer, 1920
             .4 Family Nesameletidae Kluge et al., 1995 see Subfamily Siphlonurinae Ulmer, 1920
             .5 Family Oniscigastridae (Lameere, 1917)
             .6 Family Prosopistomatidae Lameere, 1917
             .7 Family Rallidentidae
             .8 Family Siphlaenigmatidae Penniket, 1962
             .9 Family Tricorythidae Lestage, 1942
             1 Suborder Carapacea
             2 Suborder Rectracheata
             3 Suborder Pisciforma