Skeleton
Locality: Morocco
Age: Maastrichtian
Length: 9 m (29.5 feet)
Mosasaurus was among the last mosasaur genera, and among the largest, being smaller and shorter than only Tylosaurus and Hainosaurus. The skull was more robustly built than other mosasaurs, as the mandibles articulated very tightly with the skull. It had a deep, barrel-shaped body, and with its fairly large eyes, poor binocular vision, and poorly developed olfactory bulbs, experts believe that Mosasaurus lived near the ocean surface, where it preyed on fish turtles, ammonites and possibly smaller mosasaurs. Because of its robust skull and tightly articulating jaws, Mosasaurus was unable to swallow prey items whole in the manner of earlier mosasaurs, like Tylosaurus. Instead, with the aid of its curved, knife-like teeth, Mosasaurus was able to tear its prey into more manageable pieces that could be more easily swallowed.
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