Most reptiles do not have a fast, sticky tongue that tasks to catch prey. They are ambush hunters and can snatch meals with their mouths. Some species are an exception, such because the chameleon, which has an extended, quick tongue. They first appeared within the Late Devonian Period, 363 million years in the past. Reptiles appeared in history in the Late Carboniferous Period, 315 million years in the past. The class Reptilia is defined as a gaggle of the newest widespread ancestors of diapsids.