During field expeditions in the Langbiang Plateau at high-elevations in the Krong No drainage, a catchment of
the Sre Pok River, a tributary of the Mekong River, and at low-elevations in the middle Dong Nai drainage, from
2011 to 2014, we collected specimens described here as two new, large Onychostoma species on the basis of
morphological and molecular characteristics.