Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Uropygi Thorell, 1882
           Order Schizomida Petrunkevitch, 1945 - schizomids
             Suborder Schizomina Petrunkevitch, 1945
               Superfamily Hubbardioidea Cook, 1899
                 1 Family †Calcitronidae Petrunkevitch, 1945
                 2 Family Hubbardiidae Cook, 1899
                 3 Family Protoschizomidae Rowland, 1975