Larvae of <Emphasis Type="Italic">Lamprogrammus shcherbachevi</Emphasis> (Ophidiiformes: Ophidiidae) from the western North Pacific Ocean |
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Authors: | Atsushi Fukui Hiroyuki Kuroda |
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Institution: | (1) Department of Fisheries, School of Marine Science and Technology, Tokai University, 3-20-1 Orido Shimizu-ku, Shizuoka 424-8610, Japan |
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Abstract: | Three exterilium larvae (18.2 mm notochord length to 113.3 mm standard length) of an ophidiid, Lamprogrammus shcherbachevi, from the western North Pacific are described. The specimens had a highly specialized morph with a remarkably elongate trailing
gut and ventral coracoid process, and many elongate anterior dorsal fin rays, as occur in other exterilium larvae, but were
characterized by unique melanophore patterns (a cluster of melanophores on the back of the stalked pectoral fin base, a row
of clusters midlaterally on the trunk and caudal region, and further clusters on the trailing gut). Although the largest specimen
(113.3 mm standard length, much larger than the previously recorded maximum size of exterilium larvae) retained typical features
of the exterilium stage, the ventral coracoid process was significantly reduced in size compared with that of a smaller specimen
(37.8 mm standard length). Comparison of the largest specimen with an adult suggests that the anterior dorsal fin rays would
disappear during the transformation stage. |
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Keywords: | Lamprogrammus shcherbachevi Exterilium larvae Ophidiidae Western North Pacific |
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