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Mitochondrial Cytochrome oxidase 1 phylogeny supports alternative taxonomic scheme for the marine Haplosclerida

Published online by Cambridge University Press:  03 December 2007

Jean Raleigh ,
Niamh E. Redmond ,
Emma Delahan ,
Seamus Torpey ,
Rob W.M. van Soest ,
Michelle Kelly  and
Grace P. McCormack
Jean Raleigh
Affiliation:
Molecular Evolution and Systematics Laboratory, Department of Zoology, Martin Ryan Institute, National University of Ireland, Galway, Ireland
Niamh E. Redmond
Affiliation:
Molecular Evolution and Systematics Laboratory, Department of Zoology, Martin Ryan Institute, National University of Ireland, Galway, Ireland
Emma Delahan
Affiliation:
Department of Biology, National University of Ireland Maynooth, Maynooth, Co. Kildare, Ireland
Seamus Torpey
Affiliation:
Department of Information Technology, National University of Ireland, Galway, Ireland
Rob W.M. van Soest
Affiliation:
Zoological Museum, University of Amsterdam, PO Box 94766, 1090 GT Amsterdam, The Netherlands
Michelle Kelly
Affiliation:
National Centre for Aquatic Biodiversity and Biosecurity, National Institute of Water and Atmospheric Research, 269 Khyber Pass Rd., New Market, Auckland, New Zealand
Grace P. McCormack
Affiliation:
Molecular Evolution and Systematics Laboratory, Department of Zoology, Martin Ryan Institute, National University of Ireland, Galway, Ireland
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Abstract

Recent molecular studies have shown that the sponge order Haploslcerida is polyphyletic as the freshwater sponges appear to be more closely related to other demosponges than they are to the marine haplosclerids. Within the marine haplosclerid clade relationships viewed via 18S and 28S rRNA gene phylogenies suggest that the suborders and many families and genera are also polyphyletic. However, both of these genes are on the same locus and do not evolve completely independently. We have analysed mitochondrial Cytochrome oxidase 1 gene fragments from 44 species of marine Haplosclerida and show conclusively that the classification of this group needs complete revision. Molecular data show a very complicated phylogeny supporting very few morphological hypotheses and little geographical pattern. However, the molecular data contain a great deal of phylogenetic signal at many taxonomic levels and support phylogenies drawn from the other genes.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 87 , Issue 6 , December 2007 , pp. 1577 - 1584
Copyright
2007 Marine Biological Association of the United Kingdom

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