Tylosaurus

Information
Tylosaurus proriger was a large mosasaur from Late Cretaceous found in Canada and the western USA. Mosasaurs were predatory marine reptiles closely related to modern day monitor lizards and snakes that died out in the KT mass extinction event, which ended the Mesozoic and began the Cenozoic. Tylosaurus grew up to 14 meters (46 feet) in length and preyed on fish, sharks, smaller mosasaurs, plesiosaurs, and flightless diving birds such as Hesperornis regalis in the Western Interior Seaway, which divided North America into two.

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