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 Aplysioidea Lamarck, 1809
Family Aplysiidae Lamarck, 1809
Subfamily Aplysiinae Lamarck, 1809
Genus Aplysia Linnaeus, 1767 - seahare
Subgenus Neaplysia Cooper, 1863