Phylum Mollusca Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960 Superfamily Cingulopsoidea Fretter & Patil, 1958 1 Family Eatoniellidae Ponder, 1965 2 Family Cingulopsidae Fretter & Patil, 1958