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 Facelinidae Bergh, 1889
               1 Genus Algarvia García-Gómez & Cervera, 1989
               2 Subfamily Facelininae Bergh, 1889
               3 Subfamily Pteraeolidiinae Risbec, 1953 [monotypic]
               4 Subfamily Crateninae Bergh, 1889
               5 Subfamily Herviellinae Burn, 1967 [monotypic]
               6 Subfamily Favorininae Bergh, 1889