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Prehistory

Deinosuchus , 30 foot Crocodilian Skeleton Deinosuchus is an extinct genusrelated to the alligator that lived 80 to 73 million years ago (Ma), during the late Cretaceous period. The name translates as "terrible crocodile" and is derived from the Greek deinos "terrible", and soukhos "crocodile". The first remains were discovered in North Carolina (United States) in the 1850s; the genus was named and described in 1909

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Herrerasaurus was one of the earliest dinosaurs. Its name means "Herrera's lizard", after the rancher who discovered the first specimen. All known fossils of this carnivore have been discovered in rocks of Carnian age (late Triassic according to the ICS, dated to 231.4 million years ago) in northwestern Argentina.The type species, Herrerasaurus ischigualastensis, was described by Osvaldo Reig in 1963 and is the only species assigned to the genus. Ischisaurus and Frenguellisaurus are synonyms

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Prognathodon Mosasaur Skeleton A medium to large-sized mosasaur, with the skull length reaching 1.5 meters and the total body length up to around 10 meters; the skull was massive and proportionately large.It had protective bony rings surrounding its eye sockets, indicating it lived in deep water. Its teeth are similar to those of some Triassic placodonts, so it may have lived a similar lifestyle, feeding on shellfish, large fish, and sea turtles

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