 There are no markings behind the eye.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).