贵州省洞穴高原鳅属一新种

A New Cave Species of Genus Triplophysa from Guizhou Province,China

描记采于贵州省盘县保田镇一地下洞穴高原鳅属一新种,命名保田高原鳅Triplophysa baotianensis sp.nov..新种是贵州省南盘江水系的首个高原鳅发现.与贵州已记载的5种高原鳅比较,新种与北盘江水系的贞丰高原鳅性状相近,但有明显特征可区别.(1)新种胸腹鳍平展与躯体呈"十"字形,贞丰高原鳅胸腹鳍走向正常;(2)新种背鳍起点在腹鳍起点之前上方,贞丰高原鳅在腹鳍起点之后上方;(3)新种体表裸露无鳞,贞丰高原鳅体被明显细鳞;(4)新种鼻瓣发育成短须状,贞丰高原鳅鼻瓣不呈须状;(5)新种属于南盘江水系,贞丰高原鳅属于北盘江水系.

A new species of troglobitic loach,Triplophysa baotianensis sp.nov.,is described based on the specimens collected from a cave（25°24′17.16″N,104°44′40.37″E）,Baotian Town,Pan County,Guizhou Province,China.This new species is the firstly recorded Triplophysafish distributed in the Nanpanjiang water system.Compared with the five loach（T.nasobarbatula,T.zhenfengensis,T.longliensis,T.longibarbatus and T.jiarongensis）distributed in Guizhou Province,the new species is similar to T.zhenfengensis,but it can be distinguished from T.zhenfengensis by the following characteristics：（1）the flatted pectoral fin and pelvic fin are cross-shaped with the body（vs.the trend of the pectoral fin and pelvic fin are normal）;（2）the starting point of the dorsal fin is in front of the beginning of the pelvic fin（vs.the starting point of the dorsal fin is after the beginning of the pelvic fin）;（3）the surface of the body is bare（vs.the body is clearly scaly）;（4）the nasal valves develop into a short whisker（vs.the nasal valves are not a short whisker）;（5）it is distributed in the Nanpanjiang water system（vs.it is distributed in the Beipanjiang water system）.