Perapsid

Many people know there was three dinosaur periods or they know there was a dinosaur era, they think of Tyrannosaurus Rex and Sauropods. They think of the mountain sized astroid that toppled the food chain and killed off the dinosaurs. 

I was wondering why people don't know there were beasts that roamed before the dinosaurs, they were called the Permian Synapsids. They were reptiles that had mammal like attributes, they had jaw bones that had mussle fibers that link inside the skull through an opening behind the eye socket, they had squared off heads and were good at controlling their body temperature, some off them had thrills on  their back to help heat up their bodies when they were cold. A lot of them were able to lift their bodies away from the floor so they could run more efficiently. Perhaps they even had four chambered hearts, who knows. 

I think they should abbreviate the name, call them Perapsids (Permian Synapsids). The Perapsids went extinct because many strong volcanoes erupted in tandom for a long time and made it hard for plant life to live, the whole earth turned into a wet dessert. The food chain collapsed and by the end of the Permian period 90% of all species were extinct. 

If the name Perapsid sticks, you read it hear first.