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
             1 Family Bradibaenidae orth. inval. [monotypic] see Family Bradybaenidae Pilsbry, 1934 (1898)
             2 Family Sphincterochilidae Zilch, 1960 (1910) [monotypic]
             3 Family Hygromiidae Tryon, 1866
             4 Family Helicellidae Ihering, 1909 see Tribe Helicellini Ihering, 1909
             5 Family Helicidae Rafinesque, 1815
             6 Family Bradybaenidae Pilsbry, 1934 (1898)
             7 Family Helminthoglyptidae Pilsbry, 1939