Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Archaegastropoda see Order Archaeogastropoda Thiele, 1925 Superfamily Pleurotomariacea see Superfamily Pleurotomarioidea Swainson, 1840 1 Family Pleurotomariidae Swainson, 1840 - slit snails 2 Family Haliotidae Rafinesque, 1815 - abalones