 The scalation includes 21 (23) rows of dorsal scales at midbody, 149-157/148-156 ventral scales in males/females or 148–159 in general, 72-76/59-65 subcaudal scales in males/females, and 9-11 supralabial scales (9-10 with the third being the largest).Found on the island of Borneo in East Malaysia (Sabah and Sarawak) and Indonesia (North Kalimantan).The type locality given is "Mount Kinabalu, Kulapis River, British North Borneo".