The peninsular rock agama or South Indian rock agama (Psammophilus dorsalis) is a common species of agama found on rocky hills in south India. An allied species, Psammophilus blanfordanus, is found in the Eastern Ghats, but north of the range of this species.
Males bask openly on exposed rocks and show head push-up displays. The larger males take up higher perch positions. They flatten their bodies when birds fly overhead. Densities of about 90 lizards per hectare have been noted.
They are found in southern India, south of about 16°N latitude. In the Western Ghats, Nilgiris, South Arcot, and Nallamalai Hills, they are found in the hilly regions at altitudes up to 6000 ft above sea level in the Nilgiris. It is very common in some parts of the Nilgiris and it was noted as being particularly common near Bangalore by M.A. Smith in The Fauna of British India.