中国浙江缨口鳅属一新种(鲤形目,平鳍鳅科,腹吸鳅亚科)

A NEW SPECIES OF THE GENUS CROSSOSTOMA FROM ZHEJIANG, CHINA(CYPRINIFORMES, HOMALOPTERIDAE, GASTROMYZONINAE)

1983年8月作者在浙江泰顺县乌岩岭国家自然保护区采集到缨口鳅属鱼类25尾，经鉴定为1新种。新种吻褶发达，吻须较长，最长吻须约为眼径的1．5倍；吻须排成1排，基部均与吻褶相连，与缨口鳅Crossostoma davidi Sauvage，1878相似，而明显区别于属内其它物种，但两者在以下性状上又存在明显区别：1）新种体侧具有18～22条横纹；2）腹部中央无鳞区延伸到胸鳍和腹鳍中点之后；3）分布区亦不同，新种仅分布于浙江飞云江水系，缨口鳅分布于福建闽江水系。

A new species belonging to Crossostoma Sauvage, 1878 is describes in this paper. The new species was collected from Zhejiang, China, and named as Crossostoma faaciolatus. Crossostoma fasciolatus sp. nov. （Figs. 1-2） Description of holotype （in ram）. No.8380338, total length 111 and body length 90, collected from a rivulet in Wuyanling Natural Resources, Tiashun County, Zhejiang, China, in Aug. 1983. The location belongs to Liguang Rivulet of Feiyun River system. The holotype is deposited in the Zhejiang Museum of Natural History, Hangzhou, China. D. iii-7-8; A. ii-5; P. 1-14; V. 1-8. Scales in L. 90-94. Vertebrae 4 ＋ 35. Depth of body in standard body length 6.8 （6.3- 7.3）, width of body 6.3 （5.6-6.6）, length of head 4.0 （3.8-4.2）, length of caudal peduncle 9.2 （8.2- 10.0）, depth of caudal peduncle 8.5 （8.1-9.1）. Depth of head in head length 2.0 （1.9-2.0）, width of head 1.4 （1.3-1.4）, length of snout 2.0 （1.8-2.1）, diameter of eye 8.4 （7.6-9.2）, width of interorbital space 2.9 （2.7-3.0）. Depth of caudal peduncle in length of caudal peduncle 0.9 （0.9-1.0）. Width of mouth in width of head 2.4 （2.3-2.6）. Body elongate, subcylindrical and compressed posteriorly. Head depressed. Tip of snout broadly rounded, the edge is thin. Rostral fold specialized to sub-rostral barbell, total number 13; papillary on posterior-lateral of lower lip verruca-liked. Rostral barbell arranged in 1 row, base of barbell always connected to the rostral fold. Scales small, about 90-94 in the lateral line; head naked. Dorsal fin origin in advance of ventrals, much nearer to base of caudal than tip of snout. Body light-brown color in formalin. The new species differs from Crossostoma davidi （Sauvage, 1878） in the following aspects： 1） with 18- 22 bar anomalistic gray-brownish stripe on body sides; 2） naked area in abdomen exceed to behind middle point between origin of pectoral to ventral fin; 3） with unconspicuous brown spot on nape; 4） length of snout bigger than basilar length of dorsal fin. The new species was known to be distributed in Feiyun River, Taishun County, Zhejiang, China.