Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods Suborder Taenioglossa see Order Mesogastropoda Thiele, 1925 [Superfamily Littoriniacea Roth, 1976, orth. inval.] see Superfamily Littorinacea Gray, 1840