Xenoturbellida

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Kingdom: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Phylum: Xenacoelomorpha
Subphylum:
Familiae (1): Xenoturbellidae

Xenoturbellida Bourlat, Juliusdottir, Lowe, Freeman, Aronowicz, Kirschner, Lander, Thorndyke, Nakano, Kohn, Heyland, Moroz, Copley & Telford, 2006

• Bourlat, S.J., Juliusdottir, T., Lowe, C.J., Freeman, R., Aronowicz, J., Kirschner, M., Lander, E.S., Thorndyke, M., Nakano, H., Kohn, A.B., Heyland, A., Moroz, L.L., Copley, R.R. & Telford, M.J. 2006. Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida. Nature 444: 85–88. DOI: 10.1038/nature05241 . Reference page. 

• Bourlat, S.J., Nielsen, C., Lockyer, A.E., Littlewood, D.T.J. & Telford, M.J. 2003. Xenoturbella is a deuterostome that eats molluscs. Nature 424: 925–928. DOI: 10.1038/nature01851 . Reference page. 
• Bourlat, S.J., Rota-Stabelli, O., Lanfear, R. & Telford, M.J. 2009. The mitochondrial genome structure of Xenoturbella bocki (phylum Xenoturbellida) is ancestral within the deuterostomes. BMC Evolutionary Biology 9: 107. DOI: 10.1186/1471-2148-9-107 . Reference page. 
• Gordon, D.P. 2009. 20. Phylum Xenoturbellida: xenoturbellids. Pp. 369–370 in: Gordon, D.P. (ed.) 2009. New Zealand inventory of biodiversity. Volume 1. Kingdom Animalia. Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press: Christchurch, New Zealand. ISBN 978-1-87725772-8. Reference page.  Reference page. 
• Nielsen, C. 2010. After all: Xenoturbella is an acoelomorph! Evolution & Development 12(3): 241–243. DOI: 10.1111/j.1525-142X.2010.00408.x .
• Philippe, H., Brinkmann, H., Copley, R.R., Moroz, L.L., Nakano, H., Poustka, A.J., Wallberg, A., Peterson, K.J. & Telford, M.J. 2011. Acoelomorph flatworms are deuterostomes related to Xenoturbella. Nature 470: 255–258. DOI: 10.1038/nature09676 Reference page. 
• Tedford, M.J. 2008. Xenoturbellida: the fourth deuterostome phylum and the diet of worms. Genesis 46(11): 580–586. DOI: 10.1002/dvg.20414 .