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 Cephalopoda Cuvier, 1795 - cephalopods
                                 Subclass Coleoidea Bather, 1888
                                   Superorder Decabrachia Boettger, 1952 see Superorder Decapodiformes Young, Vecchione & Donovan, 1998
                                     Order Teuthoidea see Order Teuthida Naef, 1916
                                       Suborder Oegopsida d'Orbigny, 1845 see Suborder Oegopsina Orbigny, 1845
                                         01 Genus Abralia Gray, 1849
                                         02 Genus Abraliopsis Joubin, 1896
                                         03 Genus Architeuthis Steenstrup, 1857 - giant squid
                                         04 Genus Bathyteuthis Hoyle, 1885
                                         05 Genus Chiroteuthis d'Orbigny, 1841
                                         06 Genus Cranchia Leach, 1817
                                         07 Genus Ctenopteryx Pfeffer, 1900, nom. illeg. see Genus Chtenopteryx Appellöf, 1890
                                         08 Genus Gonatus Gray, 1849
                                         09 Genus Histioteuthis d'Orbigny, 1841
                                         10 Genus Illex Steenstrup, 1880
                                         11 Genus Ommastrephes d'Orbigny, 1835
                                         12 Genus Onychoteuthis Lichtenstein, 1818