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MBE Advance Access published online on January 24, 2008
Molecular Biology and Evolution, doi:10.1093/molbev/msn019
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© The Author 2008. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Research Article

Phylogenetic position of Nemertea derived from phylogenomic data

Torsten H. Struck and Frauke Fisse

FB05 Biology/Chemistry, AG Zoology, University of Osnabrück, Osnabrück, Germany

Corresponding author: Dr. Torsten H. Struck, FB05 Biology/Chemistry, AG Zoology, University of Osnabrück, Barbarastr. 11, 49069 Osnabrück, Germany, telephone +49-541-9693450, fax +49-541-9692857, e-mail struck{at}biologie.uni-osnabrueck.de

Received for publication September 27, 2007. Revision received December 20, 2007. Accepted for publication January 20, 2008.

Nemertea and Platyhelminthes have traditionally been grouped together because they possess a so-called acoelomate organization, but lateral vessels and rhynchocoel of nemerteans have been regarded as coelomic cavities. Additionally both taxa show spiral cleavage patterns prompting the placement of Nemertea as sister to coelomate Protostomia, i.e., either to Neotrochozoa (Mollusca and Annelida) or to Teloblastica (Neotrochozoa plus Arthropoda). Some workers maintain a sister group relationship of Nemertea and Platyhelminthes as Parenchymia, because of an assumed homology of Götte's and Müller's larvae of polyclad Platyhelminthes and the pilidium larvae of heteronemerteans. So far molecular data were only able to significantly reject a sister group relationship to Teloblastica.

Key Words: Nemertea • phylogenomics • Lophotrochozoa • Eutrochozoa • Parenchymia • Teloblastica


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