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 Arrenuroidea Thor, 1900
                     Family Gretacaridae Viets, 1978 see Subfamily Gretacarinae Viets, 1978