[dinosaur] First stegosaur fossil bone from Upper Jurassic of South America

Subject: [dinosaur] First stegosaur fossil bone from Upper Jurassic of South America

From: Ben Creisler <bcreisler@gmail.com>

Date: Mon, 18 Jan 2021 08:08:25 -0800

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Ben Creisler

bcreisler@gmail.com

A new paper:

Oliver W. M. Rauhut, JosÃ Luis Carballido & Diego Pol (2021)
First Osteological Record of a Stegosaur (Dinosauria, Ornithischia) from the Upper Jurassic of South America
Journal of Vertebrate Paleontology: e1862133
doi: https://doi.org/10.1080/02724634.2020.1862133
https://www.tandfonline.com/doi/abs/10.1080/02724634.2020.1862133

A stegosaurian humerus from the OxfordianâTithonian(?) CaÃadÃn CalcÃreo 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 CaÃadÃn CalcÃreo 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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