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CEDARPELTA

a plant-eating ankylosaurid dinosaur from the Early Cretaceous of North America.
image
Pronunciation: SEE-dar-PEL-tuh
Meaning: Cedar Shield
Author/s: Carpenter, Bird, et al. (2001)
Synonyms: None known
First Discovery: Utah, USA
Chart Position: 400

Cedarpelta bilbeyhallorum

Cedarpelta bilbeyhallorum (Bilbey and Hall's Cedar Mountain shield) is the most primitive known ankylosaurid—the club-tailed ankylosaurs—and is most closely related to the Asian Gobisaurus domoculus and Shamosaurus scutatus according to Ken Carpenter's 2001 diognosis. It's also one of the largest, rivalling Ankylosaurus magniventris itself size-wise, but it hasn't been without its doubters.

A particularly long snout and lack of cranial ornamentation led Vickaryous et al. (2004) to suspect an affinity with the spike-shouldered nodosaurids - the ankylosaurs with, well, particularly long snouts that lacked cranial ornamentation, but the discovery sometime later of a huge club-ended tail and a lack of shoulder spikes soon put that rather short-lived theory to bed. Carpenter's original ankylosaurid identification was right on the money.

The skull of Cedarpelta was discovered disarticulated and was missing its lower jaw, but far from being a bad thing this afforded paleontologists the first glympse inside of an ankylosaurid noggin and the opportunity to study its individual bones which until this point had always been part of an impenetrable, heavily-fused unit.
(Bilbey and Hall's Cedar Mountain shield) Etymology
Cedarpelta is derived from "Cedar" (for the Cedar Park Formation) and the Greek "pelte" (shield) in reference to its place of discovery and its armour. The species epithet, bilbeyhallorum (bil-bee-haw-LOR-um), honors Sue Ann Bilbey and Evan Hall who discovered the type locality.
Discovery
The first fossils of Cedarpelta were discovered at Price River I site in the Mussentuchit Member of the Cedar Mountain Formation, Carbon County, Utah, USA.
The holotype (CEUM 12360) is a partial skull, lacking the lower jaw.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Cretaceous
Stage: Albian-Cenomanian
Age range: 102-98 mya
Stats:
Est. max. length: 7 meters
Est. max. hip height: ?
Est. max. weight: 4.5 tons
Diet: Herbivore
Family Tree:
Dinosauria
Ornithischia
Thyreophora
Ankylosauria
Ankylosauridae
Cedarpelta
bilbeyhallorum
References
• Carpenter K, Kirkland J.I, Birge D. and Bird J. (2001) "Disarticulated skull of a new primitive ankylosaurid from the Lower Cretaceous of Utah" in "The Armored Dinosaurs".
• Vickaryous M.K, Maryańska T. and Weishampel D.B. (2004) "Ankylosauria" in Weishampel, Dodson and Osmólska (eds.) " The Dinosauria: Second Edition".
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To cite this page:
Atkinson, L. "CEDARPELTA :: from DinoChecker's dinosaur archive".
›. Web access: 18th Dec 2017.
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