Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Heterogastropoda see Superfamily Heterogastropoda 1 Suborder Ptenoglossa Gray, 1853 see Infraorder Ptenoglossa Gray, 1853