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2009-02-13 – Peloroplites cedrimontanus: a new nodosaurid ankylosaur

Researchers discover bones of armored dinosaur

College of Eastern Utah researchers have located the largest nodosaur ever, according to a December 2008 article in the Journal of Vertebrate Paleontology. The Nodosaur is an armored dinosaur that is part of the a group known as ankylosaurs.

The article written by Kenneth Carpenter of the Denver Museum of Nature and Science with the assistance of Jeff Bartlett, John Bird and Reese Barrick of the CEU Museum, reports that bones of a partial skull and post-cranial skeleton of a new large nodosaurid anklylosaur were found in the Cedar Mountain Formation southeast of Price.



Ankylosaurs from the Price River Quarries, Cedar Mountain Formation (Lower Cretaceous), East-Central Utah 

Kenneth Carpenter, Jeff Bartlett, John Bird, Reese Barrick – pg(s) 1089–1101


A new large nodosaurid ankylosaur, Peloroplites cedrimontanus, is described from a partial skull and postcranial skeleton found at the PR-2 Quarry located at the base of the Mussentuchit Member of the Cedar Mountain Formation in central Utah. The specimen is about the same size as the contemporary nodosaurid Sauropelta edwardsorum from the Cloverly Formation of Montana, and is of an individual approximately 5–5.5 m long. The skull of Peloroplites differs from that of Sauropelta in the vertical orientation of the suspensorium, non-domed cranium and broad, square premaxillary beak. The quarry is near and roughly at the same level as the CEM Quarry that produced the holotype of the ankylosaurid Cedarpelta bilbeyhallorum. The postcrania of Cedarpelta is described and illustrated based on the paratype and new material. These elements clearly establish that Cedarpelta is closer to Ankylosaurus than to Sauropelta. As a primitive ankylosaurid, there is no a priori reason to assume that the tail club was present. Based on recent finds in China, a hypothesis is presented that the tail club is a derived feature in non-shamosaurine (i.e., ankylosaurine) ankylosaurids.

Abstract & References : Full Text : PDF (2257 KB) : Rights & Permissions 


febbraio 13, 2009 - Posted by | - Ornitopodi, - R. Dinosauri, 1 Cretaceo, America Northern, An. Vertebrates, Articolo sc. di riferimento, Bl - Top posts, Mesozoic, P - Ritrovamenti fossili, Paleontology / Paleontologia, X - J.Vert.Paleo. | , , , , , , ,

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