1. The snake is a reptile Squamata Serpentes.

2. The snake belongs to chordate phyla, vertebrate, reptile, squamata, serpents, in the animal kingdom.

3. The genus Phrynocephalus(Squamata, Agamidae)is familiar lizards inhabited desert and sparse steppes in Eurasia.

4. Yet, the phylogenetic relationships among major groups of Squamata remain controversial up to now.

5. Squamata are the most largest taxon of reptiles which distributed all over the world, and they are widely used in ecological, biogeogrophical and evolutionary studies.

6. Snakes are limbless, cold-blooded, and scaly reptiles belonging to the order of Squamata .