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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Albertaceratops ： ウィキペディア英語版 Albertaceratops ''Albertaceratops'' (meaning "Alberta horned face") was a genus of centrosaurine horned dinosaur from the middle Campanian-age Upper Cretaceous Oldman Formation of Alberta, Canada. ''Albertaceratops'' is known from a single complete skull (TMP.2001.26.1) found in August 2001 and skull and postcranial fragments. This genus is unusual in combining long brow horns with an otherwise centrosaurine skull, as centrosaurines normally possess short brow horns. Over its nose was a bony ridge, and on its frill were two large outwardly-projecting hooks. A phylogenetic analysis carried out by its describer, Michael J. Ryan, found it to be the most basal centrosaurine.〔Ryan, M.J. (2007). (A new basal centrosaurine ceratopsid from the Oldman Formation, southeastern Alberta ). ''Journal of Paleontology'' 81(2):376-396.〕 Additional specimens were reported from a bonebed in the Judith River Formation of Montana, which is equivalent to the Oldman Formation and differentiated only by the United States/Canadian border. However, further study showed these remains to come from a chasmosaurine, ''Medusaceratops''. Both ceratopsids lived during the same time period, about 77.5 million years ago.〔Ryan, Michael J.; Russell, Anthony P., and Hartman, Scott. (2010). "A New Chasmosaurine Ceratopsid from the Judith River Formation, Montana", In: Michael J. Ryan, Brenda J. Chinnery-Allgeier, and David A. Eberth (eds), ''New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium'', Indiana University Press, 656 pp. ISBN 0-253-35358-0.〕 The specific name, ''A. nesmoi'', is derived from the name of Cecil Nesmo, a rancher living in Manyberries, Alberta, a town of less than 100 people located 71 km south of Medicine Hat. The rancher was thus honored in recognition of his efforts to aid fossil hunters. ==See also== * Timeline of ceratopsian research 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Albertaceratops」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.