Known from the Mekong basin from above Pak Beng to the Khoné Falls (Ref. 37772). Found in Ban Hang Khone, a village on an island in the middle of the mainstream Mekong River just below the Great Khone Waterfalls in Khong District, Champasak Province (Ref. 37767). Undertakes reproductive and trophic/dispersal upstream migration during the wet season in May-July through Hoo Som Yai at the Great Fault Line on the Mekong River, Champassack Province (Ref. 37771). Also Ref. 185, 8984, 12228, 26920, 30857, 50526, 56905, 58867.