Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848 Order Entomotaeniata Bartsch, 1916 1 Superfamily Pyramidellacea see Superfamily Pyramidelloidea Gray, 1840