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 Cheliferoidea Risso, 1826
               1 Family Atemnidae Kishida, 1929
               2 Family Cheliferidae Risso, 1826
               3 Family Chernetidae Menge, 1855
               4 Family Withiidae Chamberlin, 1931