Arachnida Lamarck, 1801
   Order Amblypygi Thorell, 1883 - whip spiders
     Suborder Euamblypygi Weygoldt, 1996
       Infraorder Neoamblypygi Weygoldt, 1996
         Superfamily Charontoidea Simon, 1892
           Family Charontidae Simon, 1892
             Genus Stygophrynus Kraepelin, 1895 see Genus Catageus Thorell, 1889
               Subgenus Stygophrynus (Stygophrynus) Kraepelin, 1895 see Genus Catageus Thorell, 1889