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
               1 Subgenus Stygophrynus (Neocharon) Dunn, 1949 see Genus Charon Karsch, 1879
               2 Subgenus Stygophrynus (Stygophrynus) Kraepelin, 1895 see Genus Catageus Thorell, 1889