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
         (Achatinid Sigmurethra)
           Suborder Sigmurethra Pilsbry, 1900 see Group Sigmurethra Pilsbry, 1900
             Superfamily Achatinoidea Swainson, 1840
               Family Subulinidae Fischer & Crosse, 1877
                 Subfamily Subulininae Fischer & Crosse, 1877
                   Genus Bocageia Girard, 1893
                     1 Subgenus Liobocageia Pilsbry, 1919
                     2 Subgenus Petriola Dall, 1905 see Genus Petriola Dall, 1905