Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Superorder Acariformes Zakhvatkin, 1952 - mitelike mites
           Order Trombidiformes Reuter, 1909
             Suborder Prostigmata Kramer, 1877
               Infraorder Anystina van der Hammen, 1972
                 Hyporder Parasitengona Oudemans, 1909
                   Superfamily Hygrobatoidea Koch, 1842
                     01 Family Pontarachnidae Koenike, 1910
                     02 Family Limnesiidae Thor, 1900
                     03 Family Omartacaridae Cook, 1963
                     04 Family Wettinidae Cook, 1956
                     05 Family Frontipodopsidae Viets, 1931
                     06 Family Ferradasiidae Cook, 1980 [monotypic]
                     07 Family Lethaxonidae Cook, Smith & Harvey, 2000
                     08 Family Hygrobatidae Koch, 1842
                     09 Family Aturidae Thor, 1900
                     10 Family Feltriidae Viets, 1926
                     11 Family Unionicolidae Oudemans, 1909
                     12 Family Pionidae Thor, 1900
                     13 Family Astacocrotonidae Thor, 1927