Gymnocranius obesus, a new large-eye seabream from the Coral Triangle.
| Autor: | Chen WJ; Institute of Oceanography, National Taiwan University, Taipei, Taiwan., Miki R; Nobeoka Marine Science Station, Field Science Center, University of Miyazaki, Miyazaki, Japan., Borsa P; Institut de recherche pour le développement (IRD), ``Océans'' Department, Marseille, France. Electronic address: philippe.borsa@ird.fr. |
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| Jazyk: | angličtina |
| Zdroj: | Comptes rendus biologies [C R Biol] 2017 Nov - Dec; Vol. 340 (11-12), pp. 520-530. Date of Electronic Publication: 2017 Sep 28. |
| DOI: | 10.1016/j.crvi.2017.08.004 |
| Abstrakt: | Two previously recorded new species of the large-eye seabream genus Gymnocranius (Gymnocranius sp. D and Gymnocranius sp. E) remain undescribed. Here we describe Gymnocranius sp. E as Gymnocranius obesus sp. nov. This new species is morphologically distinct from all other known species under Gymnocranius by the following combination of characters: relatively deep body, with ratio of standard length to body depth 2.2-2.4; protruding large eye, with eye diameter about equal to or slightly larger than inter-orbital width; caudal fin moderately forked; no blue spots or wavy blue lines on cheek and snout in adults; fourth transversal dark bar on flank running from the sixth spine of the dorsal fin to the origin of the anal fin; anal, caudal and dorsal fins drab with yellowish to yellow margins. Gymnocranius obesus sp. nov. is distinct from G. griseus, with which it has been previously confused by a relatively larger head, scales above lateral line without dark basal patch, and a smaller number of front scales on the dorsal side of the head. Gymnocranius obesus sp. nov. is genetically distinct from its closest known relative, Gymnocranius sp. D by 104 diagnostic nucleotide characters, which translates into a 9.6% sequence divergence at the mitochondrial cytochrome b gene. Gymnocranius obesus sp. nov. reaches a length of at least 295mm. Its distribution, from the Ryukyu Islands to Bali, including Taiwan and the Flores Sea, mostly coincides with the western half of the Coral Triangle. (Copyright © 2017 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.) |
| Databáze: | MEDLINE |
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