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 Anaspidea Fischer, 1883 - sea hares Superfamily Aplysiacea see Superfamily Aplysioidea Lamarck, 1809 1 Family Aplysiidae Lamarck, 1809