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 Suborder Heteropoda Lamarck, 1812 1 Superfamily Carinarioidea H.M.D. de Blainville, 1818 see Superfamily Pterotracheoidea Rafinesque, 1814