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ORODROMEUS

a plant-eating orodromine ornithopod dinosaur from the Late Cretaceous of North America.
Pronunciation: OR-o-DROHM-ee-us
Meaning: Mountain runner
Author/s: Horner and Weishampel (1998)
Synonyms: Laosaurus minimus?
First Discovery: Montana, USA
Chart Position: 275

Orodromeus makelai

(Makela's Mountain Runner)Etymology
Orodromeus is derived from the Greek "oros" (mountain) in reference to the Egg Mountain site where it was found, and "dromeus" (runner) because of the animal's presumed cursorial (running) habits. The species epithet, makelai, honors the late Robert Makela for his many dinosaur discoveries, among which was the Orodromeus holotype.
Discovery
The first remains of Orodromeus were discovered at "Egg Mountain"—the nesting ground of Maiasaura—in the Two Medicine Formation at Willow Creek, Teton County, Montana, USA, by Robert Makela. The holotype (MOR 294) is a virtually complete skull and skeleton, lacking the tail. Referred specimens include PU 22412 (a pair of hind legs), MOR 331 (a partial skeleton), MOR 248 (a skull and partial skeleton), and MOR 403 (a braincase). MOR 246 (a clutch of 19 eggs with embryos) was initially assigned here too, but they were misidentified and actually belong to Troodon formosus.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Campanian
Age range: 80-73 mya
Stats:
Est. max. length: 2.5 meters
Est. max. hip height: 0.7 meters
Est. max. weight: 45 Kg
Diet: Herbivore
orodromeus size
References
• Horner JR and Weishampel DB (1988) "A comparative embryological study of two ornithischian dinosaurs". Nature, 332(6161): 256-257.
• Horner JR and Weishampel DB (1996) "A comparative embryological study of two ornithischian dinosaurs, a correction". Nature 383: 103-103.
• Scheetz RD (1999) "Osteology of Orodromeus makelai and the phylogeny of basal ornithopod dinosaurs". Ph.D. Thesis in Biology, Montana State University (MSU), Bozeman, 189 pp.
• Varricchio DJ, Martin AJ and Katsura Y (2007) "First trace and body fossil evidence of a burrowing, denning dinosaur". Proc Biol Sci. 274(1616): 1361–1368 / doi:10.1098/rspb.2006.0443
• Martin A.J. (2005) "Introduction to the Study of Dinosaurs".
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To cite this page:
Atkinson, L. "ORODROMEUS :: from DinoChecker's dinosaur archive".
›. Web access: 25th Sep 2017.
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