Desmostylus hesperus tooth from the Middle Miocene Period (14 - 19 million years ago), Tremblor Group, Pyramid Hill, Kern Co. Bakersfield, California. Here is a very unusual and hard to find fossil tooth from the famous Sharktooth Hill site. This tooth is from an extinct ancestor to the Sea Cow. This tooth is 1 1/2" long, 1 1/2" tall and 3/4" wide. It has biting surface with 4 complete "cones" and shows the natural feeding/growth wear to at least 2 other "cones".
This animal had a long body (up to 8 feet), short legs, and five toed feet that resembled the feet of an elephant. The skull was large, broad and blunt, and the canine teeth evolved into tusks which the males used in fighting. Coryphodon looked much like a pigmy hippopotamus, and probably spent much of it's time in the water. Coryphodon had thick bones which restricted destruction and therefore became good and common fossils. This tooth was collected from the Willwood Formation, Eocene Period of Wyoming.
A section of lower jaw of the extremely rare mammal Stibarus from the Lower Oligocene Period of western Nebraska. Stibarus belonged to a suborder of artiodactylous mammals including piglike forms such as the extinct "giant pigs" and the hippopotami.
The fossil partial jaw of the Oligocene period dog called Hesperocyon. The skeleton was much like a weasel. The body was long and flexible, the limbs short. All five toes were present on the short and spreading feet, which appear to have been armed with retractile claws.
This fish is from the Cretaceous of Lebanon. The fish measures 3 1/4 x 1 1/4. The spot near the lower tail lobe is a scale from another larger fish.