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Journal Molluscan Studies Advance Access published online on May 6, 2009
Journal of Molluscan Studies, doi:10.1093/mollus/eyp023
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© The Author 2009. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved

A NEW SPECIES OF CISTOPUS (CEPHALOPODA: OCTOPODIDAE) FROM TAIWAN AND MORPHOLOGY OF MUCOUS POUCHES

Jian-Xiang Liao1 and Chung-Cheng Lu2

1Institute of Marine Biology, National Sun Yat-sen University, Kaohsiung 804, Taiwan; and 2Department of Life Sciences, National Chung-Hsing University, Taichung 402, Taiwan

Correspondence: C.-C. Lu; e-mail: cclu{at}dragon.nchu.edu.tw


  Abstract

Cistopus taiwanicus n. sp. is a medium to large benthic octopus. The primary diagnostic character for the genus Cistopus is the possession of eight mucous pouches set in the oral surface of the webs between each of the arm bases. This study describes the morphological characters of C. taiwanicus from Taiwanese waters and the histology of the mucous pouches. Cistopus taiwanicus can be distinguished from Cistopus indicus by enlarged suckers in mature males and lower sucker counts on normal arms and hectocotylized arm. The inner walls of the mucous pouches are composed of columnar epithelial cells and mucus is secreted from the epithelial cells. Cistopus taiwanicus shows sexual dimorphism in the openings of the mucous pouches; males possess radial white stripes around the mucous pores and significantly larger pore diameters.

(Received 20 November 2007; accepted 19 March 2009)


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