Johanna Taylor Cannon, Bruno Cossermelli Vellutini, Julian Smith, Fredrik Ronquist, Ulf Jondelius, Andreas Hejnol: Xenacoelomorpha is the sister group to Nephrozoa.Nature 530, 4. Februar 2016; S. 89–93 doi:10.1038/nature16520
Greg W. Rouse, Nerida G. Wilson, Jose I. Carvajal, Robert C. Vrijenhoek: New deep-sea species of Xenoturbella and the position of Xenacoelomorpha.Nature 530, 4. Februar 2016; S. 94–97 doi:10.1038/nature16545
