云南金线鲃一新种及其性状的适应性（鲤形目：鲤科）

A NEW FISH OF THE GENUS SINOCYCLOCHEILUS FROM YUNNAN WITH COMMENTS ON ITS CHARACTERISTIC ADAPTATION(CYPRINIFORMES:CYPRINIDAE)

透明金线，新种ＳｉｎｏｒｙｃｌｏｃｈｅｉｌｕｓｈｙａｌｉｎｕｓＣｈｅｎｅｔＹａｎｇ，ｓｐ．ｎｏｖ．生活于云南阿庐古洞的暗河中，就其性状的适应性演变序列而言，应是迄今发现的５种洞穴定居性金线种类中特化程度最高者．在洞穴鱼类中，类似金线种类普遍存在于头部的感觉突是罕见的，据此推测具２行咽齿的驼背属是源于金线的一个特化分支。

Abstract Alu Limestone Caves consisting of three subcaves and one underground river,is a developed limestone cave system. Although it was mentioned in anment bookspublished in 1541 that there was a hyaline fish living in the caves, no specimenshave been collected and formally identified by ichthyologists. In June 1991, the authors eventually collected two specimens of the hyaline fish which is identified as anew spedes of Sinocyclocheilus of Barbinae. It is named as Sinoryclocheilushyalinus Chen et Yang, sp. nov. The new species is described and discussed as fol lowing:Sinocyclocheilus hyali'us sp. nov. (fig. 1 )Local name hyaline fish (Luxi County)Holotype No.gl6001, 87 mm SL, collected in June 1991 from Alu LimestoneCaves (103 ° 45' E, 24° 33'N ) in Luxi County, Yunnan. Holotype is depositedin Fish Section of Kunming institute of Zoology, Academia Sinica.Paratype No.916002, 1 ex., 83. 5 mm SL, same data as holotype. Paratype