Known from the Mekong basin (Ref. 9840, 27732) in the Nakornpanom Province (Ref. 32444) and in Ban Hang Khone, a village on an island in the middle of the mainstream Mekong River just below the Great Khone Waterfalls in Champasak Province (Ref. 37767). Reported also to occur in the Mekong above the great waterfalls (Ref. 9497). Fishermen at Ban Hang Khone recognize only one large species of pa fa hang or stingray, attaining 30 kg or more (presumably Dasyatis laosensis) (Ref. 9497). Museum: Mekong river at Ban Hang Khone, just below Khone Falls, CAS 93987 (Ref. 5515). Also Ref. 9840, 12693, 30857, 56905.