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
                 1 Subfamily Subulininae Fischer & Crosse, 1877
                 2 Subfamily Rumininae Wenz, 1923
                 3 Subfamily Obeliscinae Thiele, 1931, nom. illeg. see Subfamily Stenogyrinae Fischer & Crosse, 1877
                 4 Subfamily Cryptelasminae Germain, 1916 [monotypic] see Subfamily Coeliaxinae Pilsbry, 1907
                 5 Subfamily Cylindrellinae Glibert, 1973, orth. inval. see Subfamily Cylindrellininae Zilch, 1959