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 Hemichordata Bateson, 1885 - hemichordates
Class Pterobranchia Lankester, 1877 - pterobranchs
Family Cephalodiscidae Schimkewitsch, 1893
Genus Cephalodiscus M'Intosh, 1882