中国贵州省穴居盲鳅一新种(鲤形目,爬鳅科)  

A NEW SPECIES OF TROGLOBITIC LOACH(CYPRINIFORMES,BALITORIDAE),TRIPLOPHYSA JIARONGENSIS,FROM GUIZHOU,CHINA

作　　者：林昱[1] 李超[1] 宋佳坤[1,2] 

机构地区：[1]上海海洋大学,水产与生命学院,海洋生物系统和神经科学研究所,上海201306 [2]Department of Biology,University of Maryland,College Park

出　　处：《动物分类学报》2012年第3期640-647,共8页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金(30970365);科技部重点项目国家973计划(2011CB111608)资助~~

摘　　要：记述了采集于贵州省荔波县佳荣镇水井湾溶洞(25°28'N,108°06'E)适应洞穴环境的鳅类1新种:佳荣盲高原鳅Triplophysa jiarongensis sp.nov.。新种与之前记录的7种分布于西江水系的高原鳅(阿庐高原鳅、个旧盲高原鳅、长须盲高原鳅、巨头高原鳅、邱北盲高原鳅、石林盲高原鳅和天峨高原鳅)同属典型洞穴鱼类,都具有一系列与洞穴环境有关的适应性特征。新种与本属其它种类的区别主要为:胸鳍长,后伸达腹鳍起点;尾鳍微凹形;体表色素退化,光滑裸露无鳞;背鳍截形,起点位于腹鳍起点略后方;腹鳍后伸盖过泄殖孔;臀鳍截形;尾柄上下缘存在脂状鳍褶;背鳍分支鳍条8;臀鳍分支鳍条6;胸鳍分支鳍条11;脊椎骨总数4+34;眼完全退化,外观无痕迹;鳔前室被骨质鳔囊包裹,后室发达膨大呈游离膜质鳔。此外还介绍了其栖息地概况和部分生态学信息。A new species of troglobitic loach,Triplophysa jiarongensis sp.nov.is described based on the collections from Shuijingwan Cave（25° 28’ N,108°06’E）,Jiarong T own,Libo County,Guizhou Province,China.T he new species distributes in the Xijiang water system such as seven previously known congeneric troglobitic loaches（T.aluensis,T.gejiuensis,T.longibarbata,T.macrocephala,T.qiubeiensis,T.shilinensis and T.tianeensis）.It shares many morphological characters with them that associated with subterranean environment.T his new species can be distinguished from other congeneric species by following combination of characters：pectoral fin highly developed,reaching the origin of pelvic fin;caudal fin emarginated;distal margin of dorsal fin truncate;dorsal-fin origin posterior to vertical line of pelvic fin origin;pelvic fin tip reaching beyond anus;distal margin of anal fin truncate;adipose-like fin present,along dorsal and ventral edge of caudal peduncle;branched rays of dorsal fin 8;branched rays of anal fin 6;branched rays of pectoral fin 11;total vertebra 4 ＋ 34;pigmentation degenerated;body smooth and scaleless;eyes completely degenerated;anterior chamber of air-bladder wrapped in bony capsule,posterior chamber of air-bladder well developed.In addition,this study introduces the profile of habitat and ecological information on the T.jiarongensis.

关 键 词：鲤形目 爬鳅科 高原鳅属 新种 洞穴鱼类 中国 

分 类 号：Q959.468[生物学—动物学]