Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Suborder Neritopsina Cox, 1960 see Order Neritopsina Cox & Knight, 1960
             Superfamily Helicinoidea Férussac, 1822
               1 Family Helicinidae Férussac, 1822 - helicinids
               2 Family Proserpinidae Gray, 1847 [monotypic]
               3 Family Ceresidae Thiele, 1925 see Family Proserpinellidae Baker, 1923