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Range DescriptionThe species is known from the middle-lower Mekong drainage, from southern China (Xishuangbanna, Yunnan; Kottelat and Chu 1987) to northern Lao PDR (the middle Xe Bangfai, a tributary of the Mekong in Lao PDR; Kottelat 1998, 2001). The species has also been reported from the Nan River (Chao Phraya drainage) in northern Thailand (survey work undertaken 2001-5; C. Vidthayanon pers. comm. 2012).