What is another word for Synapsid Reptile?
Pronunciation: [sˈɪnɐpsˌɪd ɹˈɛpta͡ɪl] (IPA) 
The "Synapsid Reptile" is a group of animals that lived during the Permian and Triassic periods. They are characterized by their skull structure which has a single hole behind the eyes (known as the temporal fenestra). Synonyms used to describe this group include "Therapsids", which refers to the later members of the group that exhibited more mammalian-like traits, and "Pelycosaurs", which is used to describe the earlier and more primitive members of the group. Other names that have been used to describe Synapsid Reptiles include "mammal-like reptiles", "stem mammals", and "proto-mammals", all of which refer to the fact that these animals are important in the evolutionary history of mammals.
