Loh Kar-Hoe, Shao Kwang-Tsao, Ho Hsuan-Ching, Lim Phaik-Eem, Chen Hong-Ming
Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, Malaysia.; Email: unknown.
Biodiversity Research Center, Academia Sinica, Nankang, Taiwan; Email: unknown.
Zootaxa. 2015 Dec 24;4060:30-40. doi: 10.11646/zootaxa.4060.1.5.
The following nine elongate unpatterned muraenid species of the subfamily Muraeninae, including one new species, are recognized from Taiwan and adjacent waters: Gymnothorax albimarginatus (Temminck & Schlegel), G. dorsalis Seale, G. melanosomatus Loh, Shao & Chen, G. phasmatodes (Smith), G. prolatus Sasaki & Amaoka, G. sagmacephalus Böhlke, Pseudechidna brummeri (Bleeker), Strophidon sathete (Hamilton) and G. pseudomelanosomatus new species, described from two specimens. This new moray eel is distinguished from its similar species, G. melanosomatus, by the following features: grey brown body (vs. black), snout length 20.5% (vs. 17.8%) of head length, smaller eye diameter 8.2% (vs. 10.0%) of head length; preanal length 49.5% (vs. 58.5%) total length, and preanal vertebrae 89-89 (vs. 105-109). Phylogenetic relationships of the nine species were examined using nucleotide sequence data from partial sequences of mitochondrial ND5 gene (600 bp), and seven species form COI (600 bp). The genetic analyses suggest that G. pseudomelanosomatus is distinct from G. melanosomatus and the other six species of Gymnothorax. Morphological features and mitogenetic affinities strongly suggest that "G." dorsalis should be placed in Strophidon rather than in Gymnothorax. The results also suggest that employment of ND5 and COI gene sequences are rather useful for identification of species and for obtaining reasonable insights into the phylogeny of the muraenid species.
在台湾及其邻近海域共鉴定出9种鳗鲡科海鳝亚科的长形无斑纹物种，其中包括1个新物种：白缘裸胸鳝（Gymnothorax albimarginatus ，由 Temminck 和 Schlegel 命名）、背斑裸胸鳝（G. dorsalis Seale）、黑身裸胸鳝（G. melanosomatus Loh、Shao 和 Chen）、拟态裸胸鳝（G. phasmatodes ，由 Smith 命名）、长体裸胸鳝（G. prolatus Sasaki 和 Amaoka）、箭首裸胸鳝（G. sagmacephalus Böhlke）、布氏拟蛇鳝（Pseudechidna brummeri ，由 Bleeker 命名）、萨氏裸胸鳝（Strophidon sathete ，由 Hamilton 命名）以及新物种拟黑身裸胸鳝（G. pseudomelanosomatus ，基于两个标本描述）。这种新的海鳝与相似物种黑身裸胸鳝的区别在于以下特征：身体呈灰棕色（而非黑色），吻长占头长的20.5%（而非17.8%），眼径较小，占头长的8.2%（而非10.0%）；肛前长占全长的49.5%（而非58.5%），肛前椎骨为89 - 89枚（而非105 - 109枚）。利用线粒体ND5基因部分序列（600 bp）的核苷酸序列数据以及7个物种的COI基因序列（600 bp），研究了这9个物种的系统发育关系。遗传分析表明，拟黑身裸胸鳝与黑身裸胸鳝以及裸胸鳝属的其他6个物种不同。形态特征和线粒体遗传亲缘关系强烈表明，“背斑裸胸鳝”应归入萨氏裸胸鳝属而非裸胸鳝属。研究结果还表明，利用ND5和COI基因序列对于物种鉴定以及深入了解鳗鲡科物种的系统发育具有重要意义。
