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The dinosaurs of North America . GEOLOGICAL SURVEY SIXTEENTH ANNUAL REPORT PART PL XLV STEGOSAURUS UNGULATUS Marsh Jurassic Pl XLV Illustration biodiversitylibrary org title Marsh Othniel Charles NameFound Stegosaurus ungulatus NameConfirmed Stegosaurus ungulatus NameBankID Biodiversity Heritage Library The dinosaurs