[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotes see Domain Eukaryota Chatton, 1925
     Metazoa Haeckel, 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
       Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
         Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
           Phylum Chordata Bateson, 1885 - chordates
             1 ?Genus †Pikaia Walcott, 1911
             2 Subphylum Tunicata Lamarck, 1816 - tunicates see Subphylum Urochordata Bateson, 1885
             3.1 Subphylum Cephalochordata Owen, 1846 - lancelets
             3.2 Subphylum Vertebrata Cuvier, 1812 - vertebrates