Abstract: According to the characters of morphology of 7 populations of Phrynocephalus at 7 areas in Xizang Autonomous Region,there are significantes differences between the population in Zetang area with other 6 populations.The population in Zetang is a new species which was named as Phrynocephalus zetangensis sp.nov.Wang,Zeng et Wu.The diagnoses of the new species are one nostril;four or five scales between nostriles;the number of dorsal scales less than the number of ventral scales;black color on the terminational tail in males and grey-white color on females.