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中国木叶鲽属鱼类一新纪录种

     

摘要

Four specimens of genus Pleuronichthys were collected from Zhoushan, Zhejiang Province (East China Sea). They were identified as Pleuronichthysjaponicus, a new species record in China. The main characters of the species were as follows: body brown; scale small, not elongated, and a little bit deciduous; supratemporal lateral line with antrorse branch on ocular and blind sides; dorsal-fin soft-rays 72~74(73. 3); anal-fin soft-rays 56~59(57. 5); pectoral-fin rays on ocular side 8~10(8. 8); pectoral-fin rays on blind side 8; pelvic-fin rays on both ocular and blind sides 6; caudal-fin rays 19~20(19. 5) ; vertebrae 36; gill rakes 3+7. The K2P distance between P. japonicus and P. cornustus was 9. 4% based on COI sequences, which indicated a species' divergence.%2008年8月,在浙江舟山附近海域(东海)采集到4尾木叶鲽属鱼类,经鉴定为中国鱼类新纪录种--长木叶鲽,其主要特征为:体棕褐色,有眼侧和无眼侧颢上枝前端有小分枝,鳞片小但不狭长,背鳍鳍条数72~74(73.3);臀鳍鳍条数56~59(57.5);有眼侧胸鳍鳍条数8~10(8.8),无眼侧胸鳍鳍条数为8;有眼侧与无眼侧腹鳍鳍条数均为6;尾鳍鳍条数19~20(19.5),脊椎骨数为36;鳃耙数为3+7.基于线粒体COI基因片段得到的长木叶鲽与角木叶鲽的K2P遗传距离为9.4%,2种间遗传分化达到了种间水平.

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