Antilocarpra americana.,The Pronghorn is sometimes considered a living fossil. It shows many primitive traits. Perhaps the most obvious primitive attribute is in that pronghorns shed their horns yearly just like a deer. It is the only living horned animal that does this. Other Names: "Prong Buck", "..
Synthetoceras Skull. Synthetoceras tricornatus. With horns. No Mandible. Early Miocene to Late Pliocene.
Polyurethane cast of an original University of California Berkeley fossil specimen.
* Size: 23.5 inch (59.7cm)
*Synthetoceras tricornatus is a large, extinct protocertid artiodactyl, end..