The species was originally found in Phu Luang Wildlife Sanctuary, Loei Province, and has later been confirmed in the neighboring Phu Kradueng National Park as well.
According to tradition, Loei was founded by people from Chiang Saen.
It was described by Puplesis and Robinson in 1999, and is known from the Loei Province in Thailand.
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The Chotikul brothers were born in Loei Province in Northeast Thailand (Asanee: April 9, 1955, Wasan: March 25, 1957) and moved to Bangkok to study.
Neighboring districts are (from the north clockwise) Phu Luang and Phu Kradueng of Loei Province, Phu Pha Man of Khon Kaen Province, Khon San of Chaiyaphum Province, and Lom Sak and Lom Kao of Phetchabun Province.
The Luang Prabang Range is practically devoid of vehicle roads on the Sainyabuli Province side, where there is only one north-south route extending from Sainyabuli, the provincial capital, to the Thai border opposite Thailand's Loei Province.