DistributionRead full entry
Range DescriptionThe species is known from a small number of records in larger tributaries in the Mekong drainage in Lao PDR (e.g., the upper Xe Bangfai (Kottelat 1998), and the Xe Kong drainage (Kottelat 2011)), Thailand (e.g., the lower Mun River; M. Kottelat pers. comm. 2012), and southern China (Xishuangbanna Prefecture, Yunnan; Kottelat and Chu 1987). The species is also known from the Nan River, a tributary of the Chao Phraya in northern Thailand, however a recent survey (March-April 2012) at five localities in Nan River tributaries did not find the species (C. Vidthayanon pers. comm. 2012), although others report that the species is still present in the upper parts of the Nan drainage (M. Kottelat pers. comm. 2012). Further appropriate survey work is required to determine the species' presence in the drainage.
The species is currently known from only five populations, but may be present at further locations within the currently known extent as the species is usually present at low densities and is hard to collect in surveys (M. Kottelat pers. comm. 2012); it is apparently present at patchy and low densities, with a few areas of higher density.