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Geosternbergia (Pteranodon sternbergi)

Pteranodon sternbergi is an extinct species of the pteranodontid pterodactyloid pterosaur genus Pteranodon from the Late Cretaceous geological period of North America. P. sternbergi was among the largest pterosaurs, with a wingspan of up to 6 metres (20 ft) in males. It has been argued that P. sternbergi should be classified in a separate genus, Geosternbergia, but this has not been followed by most other researchers.