Skull of Prognathodon stadtmani giant marine reptile mosasaur of Late Cretaceous era found in Colorado at BYU Earth Science Museum. Provo, UT.

Skull of Prognathodon stadtmani giant marine reptile mosasaur of Late Cretaceous (82 million years ago) era found in Colorado at BYU Earth Science Museum. Provo, UT.

Skull of Prognathodon stadtmani giant marine reptile mosasaur of Late Cretaceous (82 million years ago) era found in Colorado at BYU Earth Science Museum. Provo, UT.
Photo by Jim Steinhart © 2011, all rights reserved. (Ref: UTP441)

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BYU Dinosaur Collection, Provo
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