[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
Subphylum Vertebrata Cuvier, 1812 - vertebrates
Infraphylum Gnathostomata Gegenbaur, 1874 - jawed vertebrates
see Superclass Gnathostomata Gegenbaur, 1874
Class †Placodermi McCoy, 1848
1 Order †Acanthothoraci Stensiö, 1944
see Order Acanthothoraciformes
2 Order †Rhenanida Broili, 1930
see Order Rhenaniformes
3 Order †Antiarchi Cope, 1885
see Order Antiarchiformes Grande & Eastman, 1986
4 Order †Petalichthyida Jaekel, 1911
see Order Petalichthyiformes
5 Order †Ptyctodontida Gross, 1932
see Order Ptyctodontiformes
6 Order †Arthrodira Woodward, 1891
see Order Arthrodiriformes Grande & Eastman, 1986