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Petrolacosaurus

Reptille are all size's Reptiles are one of the oldest line of animals, starting with Hylonomous, the first anapsid, to petrolacosaurus, the first diapsid and finally, archatchriax the first synapsid. Reptiles started in the carborniferus period.A snake is a reptiles

The scientific name for reptiles are Reptilia Reptiles, the class Reptilia, are an evolutionary grade of animals, comprising today's turtles, crocodilians, snakes, lizards, and tuatara, as well as many extinct groups. A reptile is any amniote that is neither a mammal nor a bird.

Unlike mammals, birds, and certain extinct reptiles, living reptiles have scales or scutes (rather than fur or feathers) and are cold-blooded. Advocates
Reptile

A lizard,(a type of reptile)

of phylogenetic nomenclature regard the traditional category 'Reptilia' to be invalid, because not all descendants of a common ancestor are included. However, in practice, these non-cladistic classifications, such as reptile, fish, and amphibian, remain in use by some biologists, especially in popular books written for a general audience. The historically combined study of reptiles and amphibians is called herpetology.

The earliest known reptiles originated around 340-335 million years ago during the Carboniferous period, having evolved from advanced reptile-like amphibians that became increasingly adapted to life on dry land. Some early examples include the lizard-like Hylonomus, Casineria and possibly Westlothiana, although the latter may be an advanced land-dwelling amphibian. In addition to the living reptiles, there are many diverse groups that are now extinct, in some cases due to mass extinction events. In particular, the K–Pg extinction wiped out the pterosaurs, plesiosaurs, ornithischians, and sauropods, as well as many species of theropods, crocodyliforms, and squamates.Scientific name: Reptilia

Lower classifications: Sauropterygia, Eureptilia, Squamata, Sphenodontidae, Turtle

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