Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Order Pseudoscorpiones De Geer, 1778
           Suborder Iocheirata Harvey, 1992
             Superfamily Cheiridioidea Hansen, 1894
               1 Family Cheiridiidae Hansen, 1894
               2 Family Pseudochiridiidae Chamberlin, 1923