Spiralian phylogenomics supports the resurrection of Bryozoa comprising Ectoprocta and Entoprocta

Autor(en): Hausdorf, Bernhard
Helmkampf, Martin
Meyer, Achim
Witek, Alexander
Herlyn, Holger
Bruchhaus, Iris
Hankeln, Thomas
Struck, Torsten H.
Lieb, Bernhard
Stichwörter: 18S RIBOSOMAL DNA; ANIMAL PHYLOGENY; Biochemistry & Molecular Biology; Bryozoa; CHAETOGNATHS; COMPLETE MITOCHONDRIAL GENOME; CYCLIOPHORA; Ectoprocta; Entoprocta; Evolutionary Biology; GENE ORDER; Genetics & Heredity; GNATHOSTOMULIDA; Metazoa; MOLECULAR EVIDENCE; phylogenomics; POSITION; SEQUENCE; Spiralia
Erscheinungsdatum: 2007
Herausgeber: OXFORD UNIV PRESS
Journal: MOLECULAR BIOLOGY AND EVOLUTION
Volumen: 24
Ausgabe: 12
Startseite: 2723
Seitenende: 2729
Zusammenfassung: 
Phylogenetic analyses based on 79 ribosomal proteins of 38 metazoans, partly derived from 6 new expressed sequence tag projects for Ectoprocta, Entoprocta, Sipuncula, Annelida, and Acanthocephala, indicate the monophyly of Bryozoa comprising Ectoprocta and Entoprocta, 2 taxa that have been separated for more than a century based on seemingly profound morphological differences. Our results also show that bryozoans are more closely related to Neotrochozoa, including molluscs and annelids, than to Syndermata, the latter comprising Rotifera and Acanthocephala. Furthermore, we find evidence for the position of Sipuncula within Annelida. These findings suggest that classical developmental and morphological key characters such as cleavage pattern, coelomic cavities, gut architecture, and body segmentation are subject to greater evolutionary plasticity than traditionally assumed.
ISSN: 07374038
DOI: 10.1093/molbev/msm214

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