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Range DescriptionThe species is known from the middle Mekong in Yunnan, southern China and northern Lao PDR. In Lao PDR it is recorded only from the Nam Youan watershed of the Mekong in Luang Namtha Province (the Nam Youan River drains from Laos to China where it enters the Nan La He River) (Fang and Kottelat 1999, Kottelat 2001, Dubeau 2004). In Yunnan, records include from Xishuangbanna, Manzhuo and Jinghong in the upper Mekong basin in southern Yunnan (Hwang et al. 1988), and the Buyuan River (Kang et al. 2009).