Stiliger nigrovittatus sp. nov., a sacoglossan mollusc from the Gulf of Mannar

Rao, K Virabhadra and Rao, K Prabhakara (1963) Stiliger nigrovittatus sp. nov., a sacoglossan mollusc from the Gulf of Mannar. Journal of the Marine Biological Association of India, 5 (2). pp. 232-238.

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Abstract

The species under the genus Stiliger Ehrenberg 1831 known hitherto from the coastal waters or backwaters and estuaries of India are very few. S. pica Annandale and Prashad (Sewell & Annandale, 1922) from Chilka Lake and S. gopalai Rao (1937) from Madras backwaters are the only species on record. Stiliger viridis (Kelaart) as described by Eliot (1906a) from the Ceylon coast of Gulf of Mannar and S. tentaculatus Eliot (1916) from Siam are two other species known from regions very close to Indian coasts. S. nigrovittatus described here is one of the few species collected by the present writers from the Palk Bay and the Gulf of Mannar in the vicinity of Mandapam. It has been experienced that a careful search among the members of filamentous algae like Chaetamorpha revealed one or the other species of the sacoglossan Opisthobranchs which feed on those algae. A few individuals of S. nigrovittatus were obtained from the Gulf of Mannar close to the Central Marine Fisheries Research Institute, Mandapam Camp, on November 29, 1962, for the first time. Subsequently they were collected from the same locality and also from Kundagal Point near Pamban in all months upto March 1963. They were observed on algal growths of Cladophoropsis zoolingeri (Kuetz.) Boergs., covering the rocks in the intertidal region. In captivity they were found feeding on this alga as also on Chaetomorpha sp.

Item Type:Article
Uncontrolled Keywords:Mollusc; Stiliger nigrovitattus; Gulf of Mannar
Subjects:Molluscan Fisheries
Marine Biodiversity
Divisions:CMFRI-Cochin > Biodiversity
ID Code:957
Deposited By:Dr. V Mohan
Deposited On:08 Jun 2010 14:47
Last Modified:15 Oct 2011 12:40

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