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 Runcinoidea Adams & Adams, 1854 Family Ildicidae Burn, 1963 see Family Runcinidae Adams & Adams, 1854 Genus Lapinura Marcus & Marcus, 1970