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The making of a branching annelid: an analysis of complete mitochondrial genome and ribosomal data of Ramisyllis multicaudata

Aguado, M. Teresa, Glasby, Christopher J., Schroeder, Paul C., Weigert, Anne and Bleidorn, Christoph (2015). The making of a branching annelid: an analysis of complete mitochondrial genome and ribosomal data of Ramisyllis multicaudata. Scientific Reports,5(Article No. 12072).

Document type: Journal Article
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Title The making of a branching annelid: an analysis of complete mitochondrial genome and ribosomal data of Ramisyllis multicaudata
Author Aguado, M. Teresa
Glasby, Christopher J.
Schroeder, Paul C.
Weigert, Anne
Bleidorn, Christoph
Journal Name Scientific Reports
Publication Date 2015
Volume Number 5
Issue Number Article No. 12072
ISSN 2045-2322   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84937458378
Total Pages 13
Place of Publication United Kingdom
Publisher Nature Publishing Group
HERDC Category C1 - Journal Article (DIISR)
Abstract Ramisyllis multicaudata is a member of Syllidae (Annelida, Errantia, Phyllodocida) with a remarkable branching body plan. Using a next-generation sequencing approach, the complete mitochondrial genomes of R. multicaudata and Trypanobia sp. are sequenced and analysed, representing the first ones from Syllidae. The gene order in these two syllids does not follow the order proposed as the putative ground pattern in Errantia. The phylogenetic relationships of R. multicaudata are discerned using a phylogenetic approach with the nuclear 18S and the mitochondrial 16S and cox1 genes. Ramisyllis multicaudata is the sister group of a clade containing Trypanobia species. Both genera, Ramisyllis and Trypanobia, together with Parahaplosyllis, Trypanosyllis, Eurysyllis, and Xenosyllis are located in a long branched clade. The long branches are explained by an accelerated mutational rate in the 18S rRNA gene. Using a phylogenetic backbone, we propose a scenario in which the postembryonic addition of segments that occurs in most syllids, their huge diversity of reproductive modes, and their ability to regenerate lost parts, in combination, have provided an evolutionary basis to develop a new branching body pattern as realised in Ramisyllis.
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