Phylogeny and zoogeography of the cyprinid genus Spinibarbus (Pisces:Cyprinidae)

The cyprinid genus Spinibarbus consists of 5 species. They form into a monophyly by three synapomorphies.Based on 19 external and skeletal characters, the most parsimonious cladogram is constructed for Spinbarbus fishes. Sister groups A (S. hollandi) and B-E (S.sinensis+S.denticulatus+S.yunnanensis+S.polylepis) represent the first phyletic branching within the genus Spinbarbus. The phyletic division of second sister groups B(S.sinensis)and C-E(S.denticulatus+S.yunnanensis+S.polylepis) is pupposed to be resulted from the upheaval of Ynnan-Guizhou Plateau and the subsequent drainages' division. The phyletic division of third sister groups C(S.denticulatus) and D-E(S.yunanensis + S.polylepis) is supposed to be resulted from the environmental differentiation between Yunnan-Guizhou Plateau and the lowlands of middle and lower Pearl and Yuanjiang Rivers.