2009年3月2日 星期一

沈氏間爬岩鰍 - 台灣產平鰭鰍科之新種

文獻來源: Chen, I-S. & Fang, L.-S. (2009): Hemimyzon sheni, a new species of balitorid fish (Teleostei: Balitoridae) from Taiwan. Environmental Biology of Fishes, DOI 10.1007/s10641-009-9452-0

沈氏間爬岩鰍(上圖)為陳義雄與方力行教授所描述的台灣產平鰭鰍科新種. 圖中顯示其與台灣間爬岩鰍(下)的差異

Abstract A new balitord fish, Hemimyzon sheni n. sp. was collected from the Tar-Ju River basin, Taitung County, southeast Taiwan. The new endemic species can be distinguished from other congeneric species by a combination of the following features: (1) dorsal fin rays 3 + 8, pectoral fin rays 13+11 (total 24); (2) lateral-line scales 78–80 and predorsal scales 31–32; (3) somewhat pointed head shape; (3) small pelvic fin which does not extend to rear vertical of dorsal fin; (4) position of anus close to anal fin base; and (5) predorsal region with many very small light brown marks and unmarked pectoral fin. A diagnostic key to three nominal, endemic species of Hemimyzon from Taiwan is also provided in this paper.