Lystrosaurus

Example:The Lystrosaurus belongs to the order of dicynodonts, which were among the most common vertebrates of the Permian period.

Definition:An order of early mammal-like reptiles that were endemic to the late Paleozoic and Mesozoic eras, characterized by a skull with a pair of tusks and a relatively flat nasal region.

Example:Lystrosaurus is an example of a therapsid, a group of early mammal-like reptiles that lived during the Permian and Triassic periods.

Definition:A group of synapsid reptiles that were the ancestors of mammals, characterized by a temporal fenestra behind each eye and other mammal-like features.