Conservation ActionsAdditional survey in suitable habitat within the species known range should be undertaken to confirm the species continued presence.
Location InformationThe species was described from the upper parts of the Rivers Ko and Tan in Viet Nam. It has not been recollected in either river or elsewhere since the collection of the types in 1936. Freyhof (M. Kottelat, pers. comm.) surveyed the area in 2000 and 2002, including the type locality and the species was not recorded.
The drainages where it was recorded from are small, estimated at somewhat over 100 km², but the species is thought likely to be restricted to the upper parts of the drainages. Further survey is required.