Natural History - Fossil Mosasaur 'Marine Dinosaur' Vertebra, Ribs and Jaw
Cretaceous Period, circa 145-65 million years B.P.. Comprising various bone and rib fragments, a large vertebra and jaw fragments with teeth from Mosasaur prognathodon sp.; on a sandstone matrix with applied plaster reinforcement to allow it to be displayed. 12.8 kg, 46 cm (18 1/8 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.