| 论文摘要： |
Background The spiny eel genus Sinobdella belongs to the family Mastacembelidae of the orderSynbranchiformes. Kottelat and Lim (1994) utilised Rhynchobdella sinensis as the typespecies to propose the genus. Currently, it contains a single species widespread in easternand southern China and northern Vietnam. New information Sinobdella longitubulus, a new species of spiny eel, is here described from the Xi-Jiang ofthe Zhu-Jiang Basin in Guangxi Zhuang Autonomous Region, southern China. It differsfrom the single congeneric species S. sinensis in having a more or less white-brown reticulated pattern on the flank, two tubular anterior nostrils longer than or equal to therostral appendage, an anal fin heavily mottled with dark brown markings and white spotsand bearing a narrow white distal margin; shorter pre-anal length; and fewer abdominalvertebrae. The validity of this new species is corroborated by its monophyly recovered in aCOI gene-based phylogenetic analysis and its significant sequence divergence with S. sinensis. A note on the type locality of S. sinensis is also given; its type specimen ispossibly from mountain streams of Jiangxi Province, in the lower Chang-Jiang Basin. |
