紋胸鮡屬魚類是鮡科魚類中種類最多,，分布最廣的類群，至今已發(fā)現(xiàn)有約80個(gè)物種分布在中印山區(qū)各水系的廣大地區(qū),。其獨(dú)特的胸部附著器是該屬魚類區(qū)別于其他屬魚類的主要特征,，也是對(duì)河川急流環(huán)境生存的一種重要的適應(yīng)性進(jìn)化。紋胸鮡屬魚類與魾屬魚類具有較近的親緣關(guān)系,，因此被認(rèn)為是比較古老的類群,。在漫長的演化過程中，隨著對(duì)不同生境的適應(yīng),，其胸部附著器也發(fā)生了很多變化,。
2005年，中科院昆明動(dòng)物研究所魚類組研究人員在小黑河（怒江二級(jí)支流）魚類考察中采集到一種紋胸鮡屬魚類新種,，其胸附著器發(fā)達(dá)并向前延伸至鰓頰部和頦部,，不同于國內(nèi)已記載的所有紋胸鮡屬魚類的附著器類型（附著器均終止于鰓峽部）。在整個(gè)紋胸鮡屬魚類中,，只有兩種具有與該新種類似的胸附著器結(jié)構(gòu),。分別是分布于印度恒河水系的印度紋胸鮡Glyptothorax indicus和分布于緬甸南部水系的紋頦紋胸鮡Glyptothorax rugimentum。該新種身體兩側(cè)具有不規(guī)則的斑紋,，多數(shù)為斜向排列,，故此命名為斜斑紋胸鮡-(Glyptothorax obliquimaculatus)。
這一新發(fā)現(xiàn)已在國際魚類學(xué)核心刊物Environmental Biology of Fishes 2010年第2期上發(fā)表,。(生物谷Bioon.com)
生物谷推薦原文出處：
Environmental Biology of Fishes, DOI: 10.1007/s10641-009-9572-6
A new species of sisorid catfish genus Glyptothorax (Teleostei: Sisoridae) from Salween drainage of Yunnan, China
Wan-Sheng Jiang1, 2, Xiao-Yong Chen1 and Jun-Xing Yang1
(1) State key laboratory of genetic resources and evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, 32 Jiao Chang Dong Road, Kunming, Yunnan, 650223, People’s Republic of China
(2) Graduate School of Chinese Academy of Sciences, Beijing, 10039, People’s Republic of China
Abstract A new species of the genus Glyptothorax, Glyptothorax obliquimaculatus sp. nov. is described from the Xiaohei River, a tributary of the Nanting River, Salween drainage, in southwestern Yunnan province, China. This new species can be distinguished from its congeners by the following combination of characteristics: unculiferous ridges of the thoracic adhesive apparatus extending anteriorly onto the gular region; body with irregular dark blotches scattered along lateral surface (blotches mostly oblique); skin smooth on head and body; dorsal spine smooth without serrations on its posterior margin; lips smooth; posterior margin of pectoral spine with 7–8 serrations; dorsal-fin base 11.0–13.2% SL; pectoral-fin length 15.6–19.6% SL; depth of caudal peduncle 8.6–9.8% SL; head width 19.1–24.0% SL; nasal barbel length 23.3–33.3% HL.
