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Conflicting signal within a single gene confounds syllid phylogeny (Syllidae, Annelida).

Abstract：

:The phylogenetic relationships within the family Syllidae have been analyzed previous to this study and a new subfamily (Anoplosyllinae) defined. However, the monophyly of the family Syllidae was not well-supported. A conflict between the different molecular data sets combined in previous preceding molecular analyses is studied herein treating the genes 18S and 16S independently using different alignment parameters, algorithms, methodologies and secondary structure considerations. The lack of support for the monophyly of Syllidae relates to a fragment of the 18S gene, the variable region V4, which demonstrates a conflicting signal when compared to the remaining 18S sequence data. A discussion regarding the phylogenetic information contained in the secondary structure of 18S is provided. In the light of these results, the implications of including/excluding ambiguous regions in the alignments are evaluated, and finally a systematic proposal for the classification of syllids is put forward.

journal_name

Mol Phylogenet Evol

journal_title

Molecular phylogenetics and evolution

authors

Aguado MT,Bleidorn C

doi

10.1016/j.ympev.2010.01.012

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

1128-38

issue

3

eissn

1055-7903

issn

1095-9513

pii

S1055-7903(10)00014-X

journal_volume

55

pub_type

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