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 Cephalaspidea Fischer, 1883 Superfamily Acteonoidea d'Orbigny, 1843 Family Philinidae Gray, 1850 (1815) Genus Philine Ascanius, 1772 Subgenus Philine Ascanius, 1772