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 Dendronotina Odhner, 1934 [monotypic]
           Superfamily Dendronotoidea Sars, 1878 see Superfamily Tritonioidea Lamarck, 1809
             Family Tritoniidae Lamarck, 1809
               1 Genus Tritonia Cuvier, 1798
               2 Genus Marionia Vayssière, 1877
               3 Genus Tochuina Odhner, 1963
               4 Genus Tritoniella Eliot, 1907
               5 Genus Tritoniopsis Eliot, 1905