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Non-Dinosaurian

Mosasaurs

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Species of Mosasaurs

Species
1
Mosasaurs probably evolved from an extinct group of aquatic lizards known as aigialosaurs in the Earliest Late Cretaceous. During the last 20 million years of the Cretaceous period), with the extinction of the ichthyosaurs and pliosaurs, mosasaurs became the dominant marine predators.

Large marine reptiles

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Mosasaurus
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