Kingdom Animalia Linnaeus, 1758 - animals Phylum Hemichordata Bateson, 1885 - hemichordates Class Pterobranchia Lankester, 1877 - pterobranchs Genus Atubaria Sato, 1936 Genus Cephalodiscus M'Intosh, 1882 Genus Rhabdopleura Allman, 1869