珠江水系鱼类一新纪录——带刺光唇鱼(鲤形目:鲤科)

A New Distribution Record of Acrossocheilus spinifer Yuan, Wu & Zhang, 2006(Teleostei: Cyprinidae) in the Pearl River System

2008年5月及2010年8月在广东省增城市及河源市采得一批鱼类标本,其中20尾经鉴定为珠江水系鱼类新纪录——带刺光唇鱼（Acrossocheilus spinifer Yuan,Wu＆Zhang,2006）。该种主要鉴别特征包括：（1）体侧具有5~6条垂直的黑色条纹,每条约占2列鳞片宽,向下延伸至侧线以下2行鳞片,呈对称或不对称分布;（2）第2条垂直条纹位于背鳍末根不分枝鳍条的下方;（3）背鳍末根不分枝鳍条为粗壮的硬刺,后缘具细小的锯齿;（4）背鳍鳍间膜外缘2/3黑色。标本现保存于华南师范大学生命科学学院鱼类标本室。

Among the collection from the Dongjiang River, one tributary of the Pearl River in Zengcheng City and Heyuan City, Guangdong province, 20 specimens of Acrossocheilus spinifer were identified as a new distribution record in the Pearl River. It can be distinguished by the combination of morphological characters：（1） 5﹣6 dark vertical bars on the flanks, with each bar 2 scales in width and all bars extending vertically to second scale row below lateral line, and the bars are symmetric or asymmetric;（2） the second bar positioned under the base of last simple dorsal-fin ray;（3） the last simple dorsal-fin ray strong, with small serrationalong posterior edge;（4） outer 2/3 part of membranes between dorsal fin rays dark. A. spinifer is diagnosed from A. beijiangensis in having 5﹣6 symmetric or asymmetric vertical dark bars on dorsum and flanks, each bar 1﹣2 scales in width（vs. in A. beijiangensis 5 symmetric vertical dark bars on flanks and each being 2﹣4 scales in width）.The specimens were deposited in fish specimen room, School of life science, South China Normal University.