Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China （Teleostei： Cypriniformes： Nemacheilidae）  

作　　者：Marco Endruweit 

机构地区：[1]Qingshan Road 601, Qingdao, China

出　　处：《Zoological Research》2014年第1期59-66,共8页动物学研究（英文）

基　　金：Special acknowledgement to Jing WANG for her tremendous support during the preparation and organization of the excursion as well as encouragement during the paper＇s compilation, Peng-Fei SHANG and Ming-Tao CUI for their helpful assistance, Lina Du, Kunming Institute of Zoology （KIZ）, Chinese Academy of Sciences, for her patience with me reviewing specimens in the institute＇s collection, Xiao- Yong CHEN and Jun-Xing YANG, both K/Z, for their support in terms of literature and material, my travel companion Michael Bisset, Tsinghua University, Beijing, for his overall support and help during the excursion.

摘　　要：An ichthyofaunistic survey of Mekong tributaries in Lincang Prefecture, Yunnan Province, China yielded a new species of nemacheilid loach, herein described as Schistura sexnubes species nova. The new species is readily distinguishable from its congeners by the following combination of characters： 8＋8 branched caudal fin rays, an incomplete lateral line, a dissociated caudal bar, a shallow caudal peduncle depth （7.6%-9.6% SL; respectively caudal peduncle 1.76-1.95 times longer than deep）, a diminutive size of less than 50 mm SL, and no sexual dimorphism. A dorsocephalic pattern consisting of a black, forward directed V-shaped formation located between the nares, and a white, ovoid blotch on the upper operculum serves as an autapomorphy.An ichthyofaunistic survey of Mekong tributaries in Lincang Prefecture, Yunnan Province, China yielded a new species of nemacheilid loach, herein described as Schistura sexnubes species nova. The new species is readily distinguishable from its congeners by the following combination of characters： 8＋8 branched caudal fin rays, an incomplete lateral line, a dissociated caudal bar, a shallow caudal peduncle depth （7.6%-9.6% SL; respectively caudal peduncle 1.76-1.95 times longer than deep）, a diminutive size of less than 50 mm SL, and no sexual dimorphism. A dorsocephalic pattern consisting of a black, forward directed V-shaped formation located between the nares, and a white, ovoid blotch on the upper operculum serves as an autapomorphy.

关 键 词：Schistura sexnubes New species Mekong basin Nemacheilidae Yunnan 

分 类 号：Q958[生物学—动物学]