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date: 22 February 2020

dinosaur 

Source:
A Dictionary of Biology
Author(s):
Elizabeth MartinElizabeth Martin, Robert HineRobert Hine

An extinct terrestrial reptile belonging to a group that arose some 225 million years ago and constituted the dominant land animals of the Jurassic and Cretaceous periods, 190–65 million years ago. There were two orders. The Ornithischia were typically quadrupedal herbivores, many with heavily armoured bodies, and included ... ...

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