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Brittle stars (Echinodermata: Ophiuroidea) from seamounts in the Andaman Sea (Indian Ocean): first account, with descriptions of new species

Published online by Cambridge University Press:  28 March 2012

Sabine Stöhr ,
Sabyasachi Sautya  and
Baban Ingole
Sabine Stöhr*
Affiliation:
Swedish Museum of Natural History, Box 50007, 10405 Stockholm, Sweden
Sabyasachi Sautya
Affiliation:
National Institute of Oceanography (Council of Scientific & Industrial Research—CSIR), Dona Paula, Goa 403 004, India
Baban Ingole
Affiliation:
National Institute of Oceanography (Council of Scientific & Industrial Research—CSIR), Dona Paula, Goa 403 004, India
*
Correspondence should be addressed to: S. Stöhr, Swedish Museum of Natural History, Box 50007, 10405 Stockholm, Sweden email: sabine.stohr@nrm.se
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Abstract

For the first time, brittle stars were collected on two seamounts in the Andaman Back-arc Basin. Of the six species, two were new to science and are described herein as Ophioleuce longispinum sp. nov. and Ophiophyllum minimum sp. nov., in the family Ophiuridae, subfamilies Ophioleucinae and Ophiurinae, respectively. Skeletal details were studied and documented by scanning electron microscopy. Morphological similarities between related species are discussed in detail. Ophioleuce longispinum sp. nov. is particularly interesting, because it combines characters typical for its genus with those otherwise only known from Ophiophyllum, such as a limpet-like disc, a fringe of marginal disc papillae or spines, and a paddle-like modified lower arm spine. The remaining species, Astrophiura cf. tiki, Ophiactis perplexa, Ophiolimna antarctica and an unidentified Ophiura, are new records for the Andaman Sea.

Keywords

OphiophyllumOphioleuceAstrophiurataxonomysystematicsmorphologyscanning electron microscopy
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 5 , August 2012 , pp. 1195 - 1208
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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