Fossil skull of the extinct cynodont therapsid Cynognathus crateronotus. Cynognathus was a powerful predator that was close to being a mammal, but not quite. It has been found in several parts of ...
Exhibit specimen of Edaphosaurus, a pelycosaur synapsid, from the collections at the Museum of Comparative Zoology. Pelycosaurs are the most ancient forerunners of mammals. This study shows that ...
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