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Range DescriptionThe species is known from the upper Mekong River (Lancangjiang) basin, the upper Red River (Yuanjiang) basin, the upper Black River (Lixiangjiang) basin and the upper Pearl River (Nanpanjiang) basin in southern China (Yunnan Province) only (Chu and Chen 1989, Yue et al. 2000). Kang et al. (2009) report the species from the headwaters (Zaq and Seq), the upper reaches (Yongchu and Tongdia), and the middle reaches (Bijian and Heihu) of the Upper Mekong in China.