[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Subclass] Acari Leach, 1817 - mites and ticks
         [Order] Parasitiformes Reuter, 1909 see Superorder Parasitiformes Reuter, 1909
           Suborder Mesostigmata Canestrini, 1891 see Order Mesostigmata Canestrini, 1891
             Infraorder Trigynaspida Camin & Gorirossi, 1955 see Suborder Trigynaspida Camin & Gorirossi, 1955
               Cohort Cercomegistina Camin & Gorirossi, 1955 see Infraorder Cercomegistina Camin & Gorirossi, 1955
                 Superfamily Cercomegistoidea Trägårdh, 1937
                   1 Family Asternoseiidae Kethley, 1977
                   2 Family Cercomegistidae Trägårdh, 1937
                   3 Family Davacaridae Kethley, 1977
                   4 Family Pyrosejidae Lindquist & Moraza, 1993
                   5 Family Saltiseiidae Walter, 2000
                   6 Family Seiodidae Kethley, 1977