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PLoS One. 2015 Oct 14;10(10):e0138352. doi: 10.1371/journal.pone.0138352. eCollection 2015.

The Postcranial Skeleton of an Exceptionally Complete Individual of the Plated Dinosaur Stegosaurus stenops (Dinosauria: Thyreophora) from the Upper Jurassic Morrison Formation of Wyoming, U.S.A.

Author information

1
Department of Earth Science and Engineering, Imperial College, South Kensington Campus, London SW7 2AZ, United Kingdom.
2
Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom.

Abstract

Although Stegosaurus is one of the most iconic dinosaurs, well-preserved fossils are rare and as a consequence there is still much that remains unknown about the taxon. A new, exceptionally complete individual affords the opportunity to describe the anatomy of Stegosaurus in detail for the first time in over a century, and enables additional comparisons with other stegosaurian dinosaurs. The new specimen is from the Red Canyon Ranch Quarry, near Shell Wyoming, and appears to have been so well preserved because it was buried rapidly in a pond or body of standing water immediately after death. The quarry is probably located in the middle part of the Morrison Formation, which is believed to be Tithonian in age in this area. The specimen is referable to Stegosaurus stenops based on the possession of an edentulous anterior portion of the dentary and elevated postzygapophyses on the cervical vertebrae. New information provided by the specimen concerns the morphology of the vertebrae, the iliosacral block and dermal armor. Several aspects of its morphology indicate the individual was not fully skeletally mature at the time of death, corroborating a previous histological study.

PMID:
26466098
PMCID:
PMC4605687
DOI:
10.1371/journal.pone.0138352
[Indexed for MEDLINE]
Free PMC Article

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