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 Notarchidae
see Subfamily Notarchinae Mazzarelli, 1893
Subfamily Stylocheilinae Eales, 1984, nom. nud. [monotypic]
Genus Stylocheilus Gould, 1852