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 Annelida Lamarck, 1809 - segmented worms
Class Polychaeta Grube, 1850 - polychaetes
Order Spionida Rouse & Fauchald, 1997
Family Apistobranchidae Mesnil & Caullery, 1898
Genus Apistobranchus Levinsen, 1883[1884]