This image is of a Rhaeboceras  (Meek, 1876) ammonite fossil. The animal existed in the Cretaceous Period. Fossil was discovered in Montan...

These images are of an Edestus (Leidy, 1856) shark fossil. The animal existed in the Carboniferous Period. Fossil was discovered in Marissa...

This image is of an Audouliceras renauxianum (d'Orbigny 1842) ammonite fossil. The animal existed in the Cretaceous Period. Fossil was ...