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 Punctoidea Morse, 1864
               1 Family Endodontidae Pilsbry, 1895
               2 Family Punctidae Morse, 1864
               3 Family Helicodiscidae Pilsbry, 1927
               4 Family Charopidae Hutton, 1884
               5 Family Otoconchidae Cockerell, 1893 [monotypic] see Subfamily Otoconchinae Cockerell, 1893
               6 Family Discidae Thiele, 1931 (1866)
               7 Family Oreohelicidae Pilsbry, 1939
               8 Family Oopeltidae Cockerell, 1891 [monotypic]