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Towards a DNA taxonomy of Caribbean demosponges: a gene tree reconstructed from partial mitochondrial CO1 gene sequences supports previous rDNA phylogenies and provides a new perspective on the systematics of Demospongiae

Published online by Cambridge University Press:  03 December 2007

Dirk Erpenbeck
Affiliation:
Biodiversity Programme, Queensland Museum, 4101 South Brisbane, Queensland, Australia Department of Geobiology, Geoscience Centre Göttingen, 37077 Göttingen, Germany
Sandra Duran
Affiliation:
Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, FL 32960, USA
Klaus Rützler
Affiliation:
Smithsonian Institution, Department of Invertebrate Zoology, MRC 163, Washington, DC 20013-7012, USA
Valerie Paul
Affiliation:
Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, FL 32960, USA
John N.A. Hooper
Affiliation:
Biodiversity Programme, Queensland Museum, 4101 South Brisbane, Queensland, Australia
Gert Wörheide
Affiliation:
Department of Geobiology, Geoscience Centre Göttingen, 37077 Göttingen, Germany

Abstract

We present the most comprehensive cytochrome oxidase subunit 1 gene tree published to date for demosponges based on new sequences. The CO1 barcoding fragment is sequenced for 65 species from the Caribbean Sea, and its gene tree reconstructed. Although its deeper nodes are not particularly well-supported, the gene tree provides a variety of information for new phylogenetic patterns, as well as support for previously published 28S rDNA gene trees. In our analysis Halichondriidae cluster with Suberitidae, supporting previous 28S rDNA data. Chelae-bearing Poecilosclerida are monophyletic but most taxa lacking chelae in this dataset cluster more distantly. Haplosclerida are not resolved monophyletically under this fragment. While some species exhibit distinct barcodes, some genera contain species that share CO1 haplotypes.

Type
Research Article
Copyright
2007 Marine Biological Association of the United Kingdom

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Towards a DNA taxonomy of Caribbean demosponges: a gene tree reconstructed from partial mitochondrial CO1 gene sequences supports previous rDNA phylogenies and provides a new perspective on the systematics of Demospongiae
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Towards a DNA taxonomy of Caribbean demosponges: a gene tree reconstructed from partial mitochondrial CO1 gene sequences supports previous rDNA phylogenies and provides a new perspective on the systematics of Demospongiae
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Towards a DNA taxonomy of Caribbean demosponges: a gene tree reconstructed from partial mitochondrial CO1 gene sequences supports previous rDNA phylogenies and provides a new perspective on the systematics of Demospongiae
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