Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
   Opisthokonta Cavalier-Smith, 1987 - opisthokonts see Clade Opisthokonta Cavalier-Smith 1987, nom. cl. inval.
     Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
       Eumetazoa Bütschli, 1910 - eumetazoans
         Triploblastica see [unranked] Bilateria Hatschek, 1888
           Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
             Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
               Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
                 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
                   Trochozoa Beklemischev, 1944 - trochozoans
                     Phylum Mollusca Linnaeus, 1758 - molluscs
                       Eumollusca
                         Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
                           Ganglioneura Rudophi, 1812
                             Rhacopoda see [unranked] Conchifera Gegenbaur, 1878
                               Class Gastropoda Cuvier, 1795 - snails and slugs
                                 opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
                                   Suborder Nudibranchia Cuvier, 1814 - sea slugs see Order Nudibranchia Cuvier, 1814
                                     Superfamily Aeolidoidea d'Orbigny, 1834 see Superfamily Aeolidioidea Gray, 1827
                                       01 Genus Aeolidia Cuvier, 1798
                                       02 Genus Berghia Trinchese, 1877
                                       03 Genus Coryphella Gray, 1850
                                       04 Genus Cuthona Alder & Hancock, 1855
                                       05 Genus Eubranchus Forbes, 1838
                                       06 Genus Facelina Alder & Hancock, 1855
                                       07 Genus Fiona Alder & Hancock, 1853
                                       08 Genus Flabellina McMurtrie, 1831
                                       09 Genus Glaucus Forster, 1777
                                       10 Genus Spurilla Bergh, 1864