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 Superfamily Clavacea 1 Family Turritellidae Lovén, 1847 - turret snails 2 Family Architectonicidae Gray, 1850 3 Family Potamididae Adams & Adams, 1854 - potamids