【摘要】 记述了采自四川省石棉县小水村(29°15’N,102°19’E;海拔900 m)和乐山市(29°33’N,102°45’E;海拔395 m)大渡河水域的爬鳅科华吸鳅属鱼类1新种,大渡河华吸鳅Sinogastromyzon daduheensis G ou et Yang,sp.nov.。其特征:臀鳍具细弱扁平的硬刺;腹鳍基部背侧具发达的肌肉瓣膜;偶鳍基背面和胸鳍腋部至腹鳍起点间的体侧无鳞;腹鳍后缘远不达肛门;侧线鳞78~82;腹鳍ⅴ-10~12。这些特征组合可以将新种与同属其它21个种区别开来。更多还原

【Abstract】 A new species,Sinogastromyzon daduheensis Gou et Yang,sp. nov.,is described based on the collections from the middle and low er reaches of the Dadu River, X iaoshuicun, Shimian C ounty( 29°15’N,102°19’E; alt. 900 m) and Leshan City( 29°33’N,103°45’E; alt. 395 m). This new species can be distinguished from other congeneric species by the follow ing characters: no stong anal-fin spine; w ith muscular band on the dorsum of the pelvic-fin base;no scales on the dorsum of paired fin or the region betw een axilla of pectoral fin and pelvic-fin origin; tip of pelvic-fin not reaching anus; 78- 82 lateral-line scales; pelvic-fin w ith simple rays.更多还原