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 Aeolidiina Eliot, 1910
Superfamily Euaeolidioidea Odhner, 1968, nom. inval.
Family Calmidae Iredale & O'Donoghue, 1923 [monotypic]
Genus Calma Alder & Hancock, 1855