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Towards a phylogeny of Euthelepus (Polychaeta: Terebellidae): the absence of synapomorphies in the subfamily Thelepodinae and genera

Published online by Cambridge University Press:  16 May 2007

André Rinaldo Senna Garraffoni
André Rinaldo Senna Garraffoni
Affiliation:
Centro de Estudos do Mar, Universidade Federal do Paraná, PO Box 50002, CEP 83255-000, Pontal do Sul, Brazil Universidade Estadual de Campinas, Instituto de Biologie, Departamento de Zoologia, PO Box 6106, CEP 13083-970, Campinas, Sao Paulo, Brazil. E-mail: andregarraffoni@yahoo.com.br
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Abstract

The phylogenetic relationships of Euthelepus (Polychaeta: Terebellidae: Thelepodinae) were studied by means of a parsimony analysis of 40 external characters. The ingroup terminals included four species of Euthelepus, and the outgroup included 14 species of eight Thelepodinae genera, three belonging to the subfamily Terebellinae, one species of Trichobranchinae, and one species of Polycirrinae. Only two most parsimonious cladograms were found. However, the analysis revealed a large number of homoplastic characters supporting the thelepodin branches. The monophyly of the genus Euthelepus was not supported, and the monophyly of the other thelepodin genera, as well as the entire subfamily, is questioned. The large number of homoplasies indicated by the analysis emphasizes the need to further evaluate these hypotheses by using additional characters. A re-classification based on phylogenetic results must be considered.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 87 , Issue 3 , June 2007 , pp. 695 - 701
Copyright
2007 Marine Biological Association of the United Kingdom

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