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Rauhut, Oliver W. M.; Carballido, Jose Luis and Pol, Diego (2021): First Osteological Record of a Stegosaur (Dinosauria, Ornithischia) from the Upper Jurassic of South America. In: Journal of Vertebrate Paleontology, Vol. 40, No. 6, e1862133

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A stegosaurian humerus from the Oxfordian-Tithonian(?) Canadon Calcareo Formation of Chubut, Argentina, extends the fossil record of this clade of thyreophoran ornithischian dinosaurs to the Upper Jurassic of South America. The element shares the derived character of an oblique ridge extending from the deltopectoral crest towards the medial distal condyle with taxa such as Kentrosaurus and Stegosaurus and thus represents a derived representative of the clade. The presence of stegosaurs in the Canadon Calcareo Formation underlines the similarities of its dinosaur fauna with other Late Jurassic dinosaur faunas, such as the Morrison Formation of North America or the Tendaguru Formation of Tanzania, in at least broad systematic terms.

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