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Marine Reptiles

Marine Reptiles


Marine reptiles, referring to mosasaurs in this classification, are only known from the Late Cretaceous. They were top predators of the Western Interior Seaway and evolved into a diversity of forms during their ~25 million years of existence. They ranged in size from less than 5 meters (16ft) (Clidastes) to 14 meters (45ft) (Tylosaurus).


Everhart, M. J., 2005. Oceans of Kansas: A Natural History of the Western Interior Sea. Indiana University Press, Bloomington. 322 pp.

Orders of Marine Reptiles present in the Creteacous of the Western Interior Seaway