What is a theraspid?

Answer 1

A therapsid is a group of animals consisting of mammals and their ancestors. They are notable for their complex jaws and evolved teeth and their upright posture.

Answer 2

A therapsid is an extinct group of vertebrates that lived during the Permian and Triassic periods. They are often considered to be the ancestors of mammals due to their mammal-like characteristics such as specialized teeth and jaw structure. Therapsids played a significant role in the evolution of terrestrial vertebrates.