Caption (A) Ventral view of the mandible and associated skull elements. (B) Mandible and skull elements labeled. (C) Left lateral view of the mandible.

About 150 million years ago, a marine turtle with a massive head dived through a shallow, tropical sea covering what is now Europe. Few complete fossils of this Jurassic sea turtle, named ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 113, No. 19 (May 10, 2016), pp. 5317-5322 (6 pages) The dorsal and ventral aspects of the turtle shell, the ...