Protobothrops xiangchengensis, commonly known as the Szechwan pit viper, Kham Plateau pit viper, or Sichuan lancehead, is a pit viper species endemic to the Hengduan Mountains in south-central China. No subspecies are currently recognized.
Originally described as a member of the genus Trimeresurus, it was later reassigned to Protobothrops.
Scalation includes 25 (23, 24) rows of dorsal scales at midbody, 175âÂÂ194/181âÂÂ194 ventral scales in males/females, 54âÂÂ66/44âÂÂ62 subcaudal scales and 7âÂÂ8 (9 or 10) supralabial scales.
Protobothrops xiangchengensis is endemic to the Hengduan Mountains in the provinces of Yunnan and western Sichuan, China. According to David & Tong (1997), the type locality given is "Sichuan Province, Xiangcheng, altitude 3100 m [10,200 ft]".