Natural History - Large Mosasaur Fossil Jaw Plaque
Cretaceous Period, 145-65 million years B.P. A number of fossil mosasaur jaw sections with at least 13 teeth, in a matrix with a plaster base. 12 kg, 45 cm (17 3/4 in.). From a Cambridgeshire, UK, collection. The Mosasaur is an extinct, large marine reptile dinosaur with a snake-like body, long snout and paddle-like limbs. Found worldwide, they competed with other well-known sea predators of the Late Cretaceous, such as plesiosaurs and ichthyosaurs, for food, existing primarily on a diet of ammonoids, cuttlefish and fish.