Appears endemic to northern Myanmar and possibly to the state of Kachin, close to the city of Myitkyina. A pair of males from separate localities were included in the type series of D. hysginon with details given as ‘stream about 1.5 km on road Myitzon-Myitkyina’ and ‘ditch marginal to fish ponds about 40km N Myitkyina, on road to Myitzon’