Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/4305
Title: <i style="">Sepia prabahari</i> sp. nov. (Mollusca/Cephalopoda), a new species of Acanthosepion species complex from Tuticorin bay, southeast coast of India
Authors: Neethiselvan, N.
Venkataramani, V. K.
Keywords: <i>Sepia prabahari</i> sp. nov
Acanthosepion species complex
description
diagnostic characters
Issue Date: Mar-2002
Publisher: CSIR
Abstract: A new cuttlefish <i style="">Sepia prabahari </i>sp. nov. collected from Tuticorin bay(8<sup>o</sup>47’N, 78<sup>o</sup>9’E) is described with a comparison of the closely related species <i style="">Sepia pharaonis</i>. <i style="">Sepia prabahari </i>sp. nov. shows a clear-cut sexual dimorphism with respect to length and shape of arms. In males, first and fourth pair of arms distinctly extended and whip like. However, in females, first and fourth arms are neither distinctly extended nor whip like. <i style="">Sepia prabahari</i> sp. nov. closely resembles the juvenile of <i style="">Sepia pharaonis </i>as both of them have distinct tiger-stripe pattern on the dorsal side of the mantle. However,<i style=""> Sepia prabahari </i>sp. nov. can easily be distinguished from the closely related species <i style="">S.pharaonis</i> based on the arrangement of suckers in the tentacular club. The tentacular club of <i style="">S. prabahari</i> sp. nov. is with minute suckers of equal size without any enlarged suckers, in contrast to that of <i style="">S. pharaonis</i> with big suckers, of which about 6 suckers in medial rows are much enlarged. In <i style="">S .prabahari</i> sp. nov. the left ventral arm of male is hectocotylised with 8 transverse series of normal basal suckers followed by 7 series of modified suckers, in contrast to 10-12 basal transverse series of normal suckers followed by 7 series of modified suckers in <i style="">S.pharaonis</i>. Further, S <i style="">prabahari </i>sp. nov<i style=""> </i>belongs to Acanthosepion species complex (Rocheburne, 1884) as its inner cone of the cuttlebone is distinct, forming rounded and cap-like cavity in contrast to that of plate like callosity in <i style="">S.pharaonis</i> and hence belongs to <i style="">Sepia sensu stricto</i> species complex. The diagnostic characters of the species belong to the Acanthosepion species complex of the genus <i style="">Sepia</i> of Indian waters with that of <i style="">S. prabahari</i> sp. nov. are also discussed.
Description: 45-51
URI: http://hdl.handle.net/123456789/4305
ISSN: 0379-5136
Appears in Collections:IJMS Vol.31(1) [March 2002]

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