A New Species of Acrossocheilus(Teleostei:Cyprinidae):A.furongjiangensis sp.nov.from Wujiang River Basin in Northern Guizhou
In this paper,the samples of Cyprinidae fishes were collected from the Furongjiang River(Huaixi River,Huaiping village,Jiucheng Town,Daozhen Gelao and Miao Autonomous County,Zunyi City,Guizhou Province),a tribu-tary of the Furongjiang River in the Wujiang River Basin in northern Guizhou Province in October 2020.The fish samples were taxonomically identified as a novel species belonging to the genus Acrossocheilus and designated as A.furongjiangensis sp.nov.The newly discovered species is slender and laterally flat,with a thin caudal peduncle.It has a short head.The mouth is short.The species has two pairs of barbels.The intestine is slightly longer,with four bends.The dorsal fin is in-serted from the rostral end to the midpoint of the caudal fin base or slightly behind.The pectoral fin extends from the dorsal fin insertion point to the middle of or briefly after the pelvic fin insertion point.The ventral fin is inserted roughly opposite to the dorsal fin.The insertion point of anal fin at the midpoint of the ventral fin and the caudal fin base.The caudal fin is forked.The lateral line is complete.The dorsal fin has ⅲ-8 rays,the pectoral fin has ⅱ-15 rays,the ventral fin has ⅲ-8 rays,and the anal fin has ⅲ-5 rays.It is morphologically similar to A.yunnanensis but can be distinguished by the follow-ing characteristics:the body depth is 21.28%of the body length(vs.27.95%),the head length is 21.86%of the body length(vs.24.17%),the caudal peduncle depth is 8.99%of the body length(vs.9.96%);eye diameter is 29.90%of the head length(vs.25.22%),the interorbital width is 34.58%of the headlength(vs.37.15%).The last simple dorsal-fin ray serrated posterior edge with sharp serrations 17-20(vs.16-23);the length of the posterior chamber of the swim bladder is more than twice the length of the anterior chamber,which has a concave anterior end ellipsoid(vs.the length of the posterior chamber is equal to twice the length of the anterior chamber,and the anterior chamber is round).Additional characteristics are as follows:the new species has no irregular black spots on the sides of the body from juvenile to adult(vs.there are 6-11 small black spots on the back of the lateral line of juvenile fish).The maxillary whiskers of the new species were long and extend backwards beyond the outer edge of the eye(vs.extension only reaches the midpoint of the eye).The horizontal extension line of the midpoint of the eye is connected to the outer edge of the gill cap near the middle in new species,while the horizontal extension line of the midpoint of the eye of the A.yunnanensis connected to the upper edge of the gill cap.The new species havs no vertical stripes on the side of the body,and the morphological characteristics such as body depth,head length,head depth,caudal peduncle depth,and eye diameter are significantly different from those from those of A.jishouensis and A.iridescens(P<0.01).
CyprinidaeAcrossocheilusnew speciesFurongjiang RiverWujiang River Basinnorthern Guizhou
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