厚唇裸重唇鱼属Gymnodiptychus的一个新亚种

A NEW CYPRINID FISH OF GENUS GYMNODIPTYCHUS FROM GANSU,CHINA

1981年5月在甘肃省清水县山门附近的牛头河(渭河支流)采得厚唇裸重唇属鱼类标本11尾,经鉴定认为是一新亚种。现描述如下。渭河裸重唇鱼(新亚种)Gymnodiptychus pachycheilus weiheensis,Subsp.nov.鉴别特征本新亚种近似厚唇裸重唇鱼Gymnodiptychus pachycheilus(Herzen-stein)和新疆裸重唇鱼Gymnodiptychus dybowskii Kessler。与中国科学院水生生物研究所、新疆维吾尔自治区水产局和兰州大学生物系珍存的新疆产的21尾新疆裸重唇鱼标本及甘肃玛曲、刘家峡(黄河上游)、卓尼、岷县(洮河水系)产的45尾厚唇裸重唇鱼相比较,具有下列明显差异(见外文摘要)。

This paper presents a new subspecies of Cyprinid fish,collected from Shanmen,Qingshui county,Gansu Province,China,in May,1981.Gymnodiptychus pachycheilus weiheensis,subsp.nov.(fig.1)Diagnosis.The new subspecies resembles Gymnodiptychus pachycheilus(Herzenstein)and Gymnodiptychus dybowskii Kessler but is distinguishable by characters as given in the following table.Types:Holotype:No.801113,,total length 282mm,standard length 230 mm,collected from Niutou River,a tributary of Weihe River in Qingshui County,southeast Gansu Province,in May 1981.Geographically,this river is located in 34°30’-35°20’N,105°50’-106°25’E,with an elevation of 1600 meters.Paratypes.Nos.801112,801114,801115,801116,801117,801118,801119,801120,801121 and 800040(3,7),total length 194-360mm,standard length 160-292mm,collected from the same locality as the holotype.Alltype specimens are kept in the Institute of Hydrobiology Academia Sinica except 800040 and 801119 which are kept in the Department of Biology,Lanzhou University.