Pseudocalotes khaonanensis is a species of agamid lizard. It is the largest species in the genus Pseudocalotes and can reach in snoutâÂÂvent length. Endemic to Thailand, it is found only in the Khao Nan Mountains in Khao Nan National Park, located in the Nakhon Si Thammarat Province of Southern Thailand. Found at high elevation (above a.s.l.) in cloud/montane forests in the stunted tree growth associated with this habitat, in trees rich with epiphyte growth.