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 Nudibranchia Cuvier, 1814 - "true" nudibranchs
Suborder Doridina Odhner, 1934
Superfamily Eudoridoidea Vaught, 1989, nom. inval.
see Superfamily Doridoidea Rafinesque, 1815
Family Discodorididae Bergh, 1891
Subfamily Discodoridinae Bergh, 1891
see Family Discodorididae Bergh, 1891
Genus Nirva Bergh, 1905