Abstract:

A new species,Sinocyclocheilus convexiforeheadus Li Yang et Li sp,nov. was found in a small lake formed after a flash flood in a karst cave of Wenliu Village，Qiubei County，Yunnan Province in October 2015.The new species is similar with Sinocyclocheilushylinus and S. aquihornes in the 5 Sinocyclocheilus species with horn.But it can be distinguished from the aforementioned two species by the following  characteristics:headstubpile;pectoral fin not attaining pelvic fin base;dorsal fin a little anterior to pelvic fin.
Holotype20151018001,standard body length 42mm,collected from Wenliuxiang of Qiubei October 2015.Kept in Reservoir of Heilongtan,Shilin,Yunnan.
DescriptionD. iii,7;A. ii,5;P. i,9;V. i,6;Branched caudal fin ray 16.Body length is 4.6 times as long as body height,3.23 times as head length,5.6 times as length of caudal peduncle,and 10.5 times as height of caudal peduncle.Length of head is 1.44 times as long asdepth of head,2.6 times as width of head.Length of caudal peduncle is 1.88 times as long as height of caudal peduncle.
Diagnosis The new species is similar with Sinocyclocheilushylinus and S. aquihornes in the 5 Sinocyclocheilus species with horn.But it can be distinguished from the aforementioned two species by the following combination of characters:headstubpile;pectoral fin not attaining pelvic fin base;dorsal fin origin a little anterior to pelvic fin origin.

Key words: cave, blind fish, Sinocyclocheilus, new species