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Orodromeus
''Orodromeus'' (meaning "Mountain Runner") is a genus of herbivorous ornithopod dinosaur from the Late Cretaceous of North America.
==Discovery and naming==
The remains of ''Orodromeus'' were discovered by Robert Makela during the excavation in Teton County, Montana, of the ''Egg Mountain'' brooding colony of a much larger relative, ''Maiasaura''. The type species, ''Orodromeus makelai'', was named and shortly described by Jack Horner and David B. Weishampel in 1988. The generic name is derived from Greek ὄρος, ''oros'', "mountain", in reference to the Egg Mountain site, and δρομεύς, ''dromeus'', "runner", referring to the cursorial habits of the animal. The specific name honoured the late Makela.〔Horner, J. and Weishampel, D., 1988, "A comparative embryological study of two ornithischian dinosaurs", ''Nature'' (London), 332(No. 6161): 256-257 (1988)〕
The holotype specimen, MOR 294, was found in a layer of the Two Medicine Formation, dating from the Campanian stage, about 75 million years ago. It consists of a partial skeleton with skull. The paratypes are MOR 249, a clutch of nineteen eggs, some with embryo; PP 22412, a set of hindlimbs; MOR 331, a partial skeleton; MOR 248, a skeleton with skull; and MOR 403, a braincase.〔 A full published description is still lacking, though an unpublished thesis on ''Orodromeus'' exists.〔Scheetz, R.D., 1999, ''Osteology of ''Orodromeus makelai'' and the phylogeny of basal ornithopod dinosaurs'' D. Ph. Thesis in Biology, Montana State University, Bozeman, 189 pp〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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