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The systematics of Raspailiidae (Demospongiae: Poecilosclerida: Microcionina) re-analysed with a ribosomal marker

Published online by Cambridge University Press:  03 December 2007

Dirk Erpenbeck
Affiliation:
Biodiversity Programme, Queensland Museum, PO Box 3300, South Brisbane, QLD 4101, Australia Department of Geobiology, Geoscience Centre Göttingen, 37077 Göttingen, Germany School of Integrative Biology, University of Queensland, Brisbane, QLD 4072, Australia
Sue List-Armitage
Affiliation:
Biodiversity Programme, Queensland Museum, PO Box 3300, South Brisbane, QLD 4101, Australia
Belinda Alvarez
Affiliation:
Museum and Art Gallery of the Northern Territory, PO Box 4646, Darwin NT 0801, Australia
Bernard M. Degnan
Affiliation:
School of Integrative Biology, University of Queensland, Brisbane, QLD 4072, Australia
Gert Wörheide
Affiliation:
Department of Geobiology, Geoscience Centre Göttingen, 37077 Göttingen, Germany
John N.A. Hooper
Affiliation:
Biodiversity Programme, Queensland Museum, PO Box 3300, South Brisbane, QLD 4101, Australia

Abstract

We present a 28S rDNA gene tree of selected Raspailiidae, Axinellidae and other demosponges to obtain insight into raspailiid phylogeny and character evolution. The Raspailiidae in our data set cluster in a well-supported clade, distinguished from Axinellidae, Agelasida and Hadromerida. Raspailia (s.s.), Eurypon, Sollasella, Aulospongus and Ectyoplasia form a Raspailiidae clade. Some Raspailia subgenera, in particular R. (Parasyringella), are not retrieved monophyletically. Trikentrion falls into the Thrinacophorinae, and not the Cyamoninae as earlier hypothesized. The axinellid genera Ptilocaulis and Reniochalina also cluster with Raspailiidae, distant from the other Axinellidae. The suitability of particular morphological characters for raspailiid phylogeny is discussed.

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

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The systematics of Raspailiidae (Demospongiae: Poecilosclerida: Microcionina) re-analysed with a ribosomal marker
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