Platecarpus ictericus, mosasaur skull, marine reptile Protoceratops Lystrosaurus was by far the

Lystrosaurus was by far the most common terrestrial vertebrate of the Early Triassic

Like many other ammonites

and Clovis-style points disappeared from the continental United States

herbivorous dinosaurs

The poster is printed on heavy-duty 110 pound

Platecarpus ictericus, mosasaur skull, marine reptile Protoceratops Lystrosaurus was by far theMosasaurs were a group of predatory marine reptiles that were very successful during the Late Cretaceous Period. The first mosasaur fossils were found in the 1770's in a mine in the Netherlands, more than 50 years before the first dinosaur bones were found. Mosasaurs were among the first fossils recognized and scientifically described. "Mosasaur" means "reptile of the Meuse," a river near the quarry where mosasaurs were first found. Mosasaurs were