[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Bilateria Hatschek, 1888 - bilaterians
         Infrakingdom Deuterostomia Grobben, 1908
           Phylum Xenacoelomorpha Philippe, Brinkmann, Copley, Moroz, Nakano, Poustka, Wallberg, Peterson & Telford, 2011
             Subphylum Xenoturbellida Westblad, 1949
               Family Xenoturbellidae Westblad, 1949