云南省洞穴盲金线鲃一新种——额凸盲金线鲃

A New Species Cave Blind Fish of the Sinocyclocheilus from Yunnan Province:Sinocyclocheilus Convexiforeheadus

2015年10月,在云南省丘北县温浏乡一喀斯特洞穴因山洪爆发形成的小湖泊中,捕到1尾无眼盲金线鲃标本.经研究系一新种,以头上额前有一短粗凸起命名额凸盲金线鲃Sinocyclocheilus convexiforeheadus Li Yang et Li sp,nov.新种与透明金线鲃S.hylinus Chen et Yang(1994)、鹰喙角金线鲃S.aquihornes Li et Yang(2007)的区别是,额部凸起短粗VS棒状长角或鹰喙状长角,胸鳍不达腹鳍起点VS胸鳍超过腹鳍起点,背鳍起点在腹鳍起点之前VS背鳍起点在腹鳍起点之后.

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 andS.aquihornes in the 5Sinocyclocheilus 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.Holotype 20151018001,standard body length 42mm,collected from Wenliuxiang of Qiubei October2015.Kept in Reservoir of Heilongtan,Shilin,Yunnan.Description D.iii,7;A.ii,5;P.i,9;V.i,6;Branched caudal fin ray 16.Body length is 4.6times as long as body height,3.23times as head length,5.6times as length of caudal peduncle,and 10.5times as height of caudal peduncle.Length of head is 1.44times as long asdepth of head,2.6times as width of head.Length of caudal peduncle is 1.88times as long as height of caudal peduncle.Diagnosis The new species is similar with Sinocyclocheilushylinus and S.aquihornes in the 5Sinocyclocheilus 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.