[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 Sejida Kramer, 1885 see Suborder Sejida Kramer, 1885
               Superfamily Sejoidea Berlese, 1885
                 1 Family Ichthyostomatogasteridae Sellnick, 1953
                 2 Family Sejidae Berlese, 1885
                 3 Family Uropodellidae Camin, 1955