Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Order Pseudoscorpiones De Geer, 1778
           Suborder Epiocheirata Harvey, 1992
             Superfamily Chthonioidea Daday, 1888
               Family Pseudotyrannochthoniidae Beier, 1932