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aqua 19(3)_Hemiscyllium halmahera

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Volume 19, Issue 3 – 19 July 2013

Gerald R. Allen, Mark V. Erdmann and Christine L. Dudgeon: Hemiscyllium halmahera, a new species of Bamboo Shark (Hemiscylliidae) from Indonesia, pp. 123-136

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Description

SINGLE PAPER

Volume 19, Issue 3 – 19 July 2013

Gerald R. Allen, Mark V. Erdmann and Christine L. Dudgeon: Hemiscyllium halmahera, a new species of Bamboo Shark (Hemiscylliidae) from Indonesia, pp. 123-136

Abstract

Hemiscyllium halmahera new species is described from two specimens, 656-681 mm TL, collected at Ternate, Halmahera, Indonesia. The new species is clearly differentiated on the basis of colour pattern. Its features include a general brown colouration with numerous clusters of mainly 2-3 dark polygonal spots, widely scattered white spots in the matrix between dark clusters, relatively few (< 10), large dark spots on the interorbital/snout region, a pair of large dark marks on the ventral surface of the head, and a fragmented post-cephalic mark consisting of a large U-shaped dark spot with a more or less continuous white margin on the lower half, followed by a vertical row of three, smaller clusters of 2-3 polygonal dark marks. The new species is most similar in general appearance to H. galei from Cenderawasih Bay, West Papua, which differs in having 7-8 large, horizontally elongate dark spots on the lower side between the abdomen and caudal-fin base, a cluster of solid dark post-cephalic spots, and usually about 25 dark spots on the upper surface of the head.

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