Platycarpus ictericus, mosasaur skull Oviraptor Thus T-rex had a variety

Thus T-rex had a variety of sizes of teeth

or "roof lizard" for it's large

Order: Ammonitida

sharp teeth

Platycarpus ictericus, mosasaur skull Oviraptor Thus T-rex had a varietyMosasaurs 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