Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Superfamily Cingulopsoidea Fretter & Patil, 1958
           Family Eatoniellidae Ponder, 1965
             Genus Pupatonia Ponder, 1965
               Subgenus Pellax Finlay, 1927