Diplomystus dentatus, Green River Fish Stegosaurus and likely spent most of

and likely spent most of its life in the water

Formation: Yorktown Age: Pliocene

There are some teeth still in the dentition also

is a medusiform Vendozoan possibly

Diplomystus dentatus, Green River Fish Stegosaurus and likely spent most ofDiplomystus is a representative of a primitive group of herring like fishes known only from the fossil record. Some Diplomystus fossils have been found that date back to the Late Cretaceous Period, 80 million years ago. This species, Diplomystus dentatus is from the Eocene Epoch and is about 55 million years old. It is found in southwestern Wyoming in the world famous Green River Formation fossil beds. In these beds, layers of fine grained limestone