| 马口鱼和宽鳍(鱼巤)鳃上发现寄生桡足类一新种(杯口水蚤目,鳋科)(英文) |
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| 作者单位： | 中国科学院水生生物研究所 武汉430072 |
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| 摘 要： | 在湖北省丹江口水库的马口鱼和宽鳍(鱼巤)的鳃上发现的寄生桡足类1新种丹江鳋。形态观察的结果表明,丹江鳋与鳋属的其他种类有很多共同特征,尤其是与博氏鳋和膨大鳋。与其它所有鳋属种类不同的是丹江鳋的第2触肢内缘光滑无刺,及其楔形第2节的外缘呈明显的弧状。以核糖体内转录间隔区(ITS)为标记进行系统进化分析,结果表明,与膨大鳋相比,博氏鳋与丹江鳋的亲缘关系更近些。无论是形态还是系统进化分析的结果都支持丹江鳋为鳋属1个独立的新种。
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| 关 键 词： | 寄生桡足类 新种 丹江鳋 丹江口水库 系统进化 |
A NEW PARASITIC COPEPOD,ERGASILUS DANJIANGENSIS SP. NOV.(POECILOSTOMATOIDA,ERGASILIDAE) ON GILLS OF TWO CYPRINID FISH OPSARIICHTHYS BIDENS AND ZACCO PLATYPUS |
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| Authors: | SONG Ying YAO Wei-Jian NIE PinState Key Laboratory of Freshwater Ecology and Biotechnology |
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| Institution: | SONG Ying,YAO Wei-Jian,NIE PinState Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China |
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| Abstract: | A new parasitic copepod, Ergasilus danjiangensis sp. nov. was found on gills of two cyprinid fish Opsariichthys bidens and Zacco platypus in Danjiangkou Reservoir of Hubei Province, China. Morphological examinations revealed that E. danjiangensis resembled the Ergasilus species in many characters, especially Ergasilus briani and Ergasilus tumidus, while E. danjiangensis can be distinguished from other Ergasilus species by the antenna morphology: a slippery inner edge and a cuniform-like second segment with a prominent arc outer edge. Based on the internal transcribed spacer (ITS) rDNA sequences, phylogenetic study revealed that E. danjiangensis was much more closely related to E. briani than to E. tumidus. The morphological and phylogenetic analyses therefore suggested that E. danjiangensis was an independent and new species in the genus Ergasilus. |
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| Keywords: | Parasitic copepod new species Ergasilus danjiangensis Danjiangkou Reservoir phylogeny |
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