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Geosternbergia is an invalid and dubious genus of Pteranodontid, pterodactyloid pterosaur (related to the famous Pteranodon) that lived in the Late Cretaceous geological period of North America. "Geosternbergia" (now called Pteranodon sternbergi) was one of the largest pterosaur genera, and had a wingspan of up to 7.25 meters.

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