金線鲃屬（Sinocyclocheilus）為中國鯉科（Cyprinidae）最大屬，目前記載有效種50 余種,，廣泛分布于云南東部,、貴州中南部及廣西壯族自治區(qū)西北部和北部等地區(qū)。其中,，26種分布于云南,。云南文山州是典型的喀斯特發(fā)育地區(qū)，洞穴魚類資源豐富,，截至目前共記錄洞穴魚類約10種,，且分布區(qū)均屬南盤江水系，主要集中于丘北和硯山兩地的龍?zhí)逗秃恿鳌?/p>
該研究將2009年9 月12 日于云南省西疇縣疇陽河（紅河水系）一洞穴采集到的金線鲃標(biāo)本鑒定為金線鲃屬一新種——西疇金線鲃屬,。本種是目前所有記載的金線鲃屬魚類分布最南的種類,， 位于北回歸線以南。
該研究成果已發(fā)表于《動物學(xué)研究》34卷第4期,，原文鏈接為：http：//www.zoores.ac.cn/CN/abstract/abstract3367.shtml,。該研究得到了中國科學(xué)院昆明動物研究所“一三五”重大專項(xiàng)的資助。（生物谷Bioon.com）
doi:10.11813/j.issn.0254-5853.2013.4.0368
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Sinocyclocheilus xichouensis, a new species of golden-line fish from the Red River drainage in Yunnan, China (Teleostei: Cypriniformes)
Xiao-Fu PAN1, Lie LI2, Jun-Xing YANG1, Xiao-Yong CHEN1
In the present study, a new species of the genus Sinocyclocheilus Fang 1936, Sinocyclocheilus xichouensis, was described from the Ganhaizi tributary of Chouyang River, Red River drainage, located in southeast Yunnan, China. This species has normal eyes and a strong dorsal spine with serrations on the lower 3/5 part. In general, this species is similar in morphology to S. macrophthalmus, S. guishanensis, S. angustiporus, S. lateristritus, S. qiubeiensis, S. grahami, S. qujingensis, S. maculatus and S. purpureus distributed in the Nanpanjiang River, and S. qiubeiensis distributed in the Red River. It is distinguished from S. macrophthalmus by possessing fewer than 9 gill rakers. However, S. xichouensis can be distinguished from S. guishanensis by its interorbital width/SL of 8.1~9.9%, rostral barbels extended to posterior margin of eye and maxillary barbels extended to posterior preopercular. It is distinct from S. lateristritus by dorsal-fin origin opposite of pelvic fin origin, with no a black stripe along the lateral line. It is distinguished from S. grahami by 74~88 lateral-line scales, 20 scale rows above the lateral line, and 16 scale rows below the lateral line. It is distinguished from S. qujingensis by a curved lateral line, 74-88 lateral-line scales, 48 circumpeduncular scales. It can be distinguished from S. yimenensis by the ratio of predorsal length, dorsal-fin base length, preanal length, anal fin length, prepectoral length, caudal-peduncle length and lower jaw length to SL, 47.1%-53.7%, 12.8%-15.8%, 66.0%-71.0%, 13.7%-17.1%, 26.0%-29.5%, 19.3%-24.7%, 4.7%-7.0%, respectively. It is distinguished from S. maculatus and S. purpureus by possession of lateral line and scaled body and distinguished from S. angustiporus and S. qiubeiensis by 35~39 predorsal scales, 6 gill rakers, and interorbital width/SL of 8.1%-9.9%.
