The Smithsonian’s National Museum of Natural History’s fossilized skeleton of the Jurassic dinosaur Allosaurus has officially been named the type specimen for the entire species. This distinction ...
The Smithsonian National History Museum’s fossil specimen of Allosaurus fragilis is perched like a nesting bird guarding a clutch of fossilized eggs. (Courtesy USNM V 4734, Department of Paleobiology, ...
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