Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Helicid Sigmurethra)
           Superfamily Helicoidea Rafinesque, 1815
             Family Bradybaenidae Pilsbry, 1934 (1898)
               Subfamily Helicostylinae Ihering, 1909
                 Genus Helicostyla Férussac, 1821
                   1 Subgenus Cochlodryas Martens, 1860
                   2 Subgenus Dryocochlias Möllendorff, 1898
                   3 Subgenus Helicobulinus Broderip, 1841
                   4 Subgenus Hypselostyla Pfeiffer, 1868
                   5 Subgenus Opalliostyla Pilsbry, 1896
                   6 Subgenus Orustia Mörch, 1852
                   7 Subgenus Pachysphaera Pilsbry, 1892