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 Rhytidoidea Pilsbry, 1893
               Family Rhytididae Pilsbry, 1893
                 01 Genus Rhytida Albers, 1860
                 02 Genus Delos Hutton, 1904
                 03 Genus Delougapia Price, 1956, orth. inval. see Genus Delouagapia Powell, 1952
                 04 Genus Diplomphalus Crosse & Fischer, 1873
                 05 Genus Macrocycloides Martens, 1867
                 06 Genus Melavitrina Iredale, 1933
                 07 Genus Nata Watson, 1934
                 08 Genus Natalina Pilsbry, 1893
                 09 Genus Ougapia Vanatta, 1930, orth. inval. see Genus Ouagapia Crosse, 1894
                 10 Genus Paryphanta Albers, 1850
                 11 Genus Powelliphanta O'Connor, 1945
                 12 Genus Priodiscus Martens, 1898
                 13 Genus Rhytidarex Powell, 1948
                 14 Genus Schizoglossa Hedley, 1893
                 15 Genus Victaphanta Iredale, 1933