Pterosaur
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
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Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...maneuverable they were in the air. Pterosaurs, unlike the flying dinosaur Archaeopteryx , were not ancestral to the birds but represented a wholly separate line of development. Like dinosaurs , pterosaurs were affected by the mass extinction at the end of the Cretaceous period...