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The southernmost records of Rebbachisauridae (Sauropoda: Diplodocoidea), from early Late Cretaceous deposits in central Patagonia

Ibiricu, LM and Casal, GA and Lamanna, MC and Martínez, RD and Harris, JD and Lacovara, KJ (2012) The southernmost records of Rebbachisauridae (Sauropoda: Diplodocoidea), from early Late Cretaceous deposits in central Patagonia. Cretaceous Research, 34. 220 - 232. ISSN 0195-6671

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We describe new and redescribe previously discovered sauropod dinosaur material from the Upper Cretaceous (middle Cenomanian-Turonian) Bajo Barreal Formation of south-central Chubut Province, central Patagonia, Argentina. The remains consist of associated and isolated axial skeletal elements recovered from three separate localities, and are herein assigned to the morphologically aberrant Rebbachisauridae clade. Several of the fossils exhibit osteological characters that were previously undocumented in rebbachisaurids, enhancing our understanding of the morphological diversity of this enigmatic sauropod group. In particular, the Bajo Barreal material demonstrates the occurrence within Rebbachisauridae of bifurcate neural spines in cervical vertebrae and well-developed, presumably pneumatic fossae in caudal vertebrae; among Diplodocoidea, these distinctive morphologies had previously been recognized only in flagellicaudatans. Furthermore, the Bajo Barreal fossils constitute the southernmost known occurrences of Diplodocoidea, adding to the globally sparse Late Cretaceous record of these sauropods and augmenting our knowledge of central Patagonian terrestrial vertebrate assemblages during this interval. © 2011 Elsevier Ltd.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Ibiricu, LM
Casal, GA
Lamanna, MC
Martínez, RD
Harris, JD
Lacovara, KJ
Date: 1 April 2012
Date Type: Publication
Journal or Publication Title: Cretaceous Research
Volume: 34
Page Range: 220 - 232
DOI or Unique Handle: 10.1016/j.cretres.2011.11.003
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Refereed: Yes
ISSN: 0195-6671
Date Deposited: 22 Apr 2014 16:49
Last Modified: 12 Oct 2017 08:55


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