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 Oleacinoidea H. Adams & A. Adams, 1855
               Family Oleacinidae Adams & Adams, 1855
                 Subfamily Oleacininae Adams & Adams, 1855
                   1 Genus Oleacina Röding, 1798
                   2 Genus Oryzosoma Pilsbry, 1891, orth. inval. see Genus Orizosoma Pilsbry, 1891
                   3 Genus Rectoleacina Pilsbry, 1907
                   4 Genus Strebelia Crosse & Fischer, 1868