Diplomystus dentatus, Green River Fish Stegosaurus a dolphin-like reptile up to

a dolphin-like reptile up to 75 feet long

The fossil was crushed

This one is large and shows the serrations and includes part of the root structure and a section of the jawbone

There are some teeth still in the dentition also

Apatosaurus Ischium W/Teeth Marks 44

Diplomystus dentatus, Green River Fish Stegosaurus a dolphin-like reptile up toDiplomystus 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