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 Cocculiniformia Hazsprunar, 1987 see Superorder Cocculiniformia Haszprunar, 1987 1 Superfamily Cocculinoidea Dall, 1882 2 Superfamily Lepetelloidea Dall, 1882