living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         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 Aeolidoidea see Suborder Aeolidina Odhner, 1934
                   Superfamily Acleioprocta Odhner, 1939 see Superfamily Fionoidea Gray, 1857
                     Family Tergipedidae Bergh, 1889
                       Genus Tergipes Cuvier, 1805
                       Genus Tenellia Costa, 1866
                       Genus Cuthona Alder & Hancock, 1855
                       Genus Ennoia Bergh, 1896
                       Genus Myja Bergh, 1896
                       Genus Embletonia Alder & Hancock, 1851
                       Genus Zatteria Eliot, 1902