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| image = Cimolopteryx.jpg | image_width = 250px | image_caption = Left coracoid of ''C. rara'' | display parents = 2 | parent_authority = Brodkorb, 1963 | authority = Marsh, 1892 | type_species = ''Cimolopteryx rara'' | type_species_authority = Marsh, 1892 | subdivision_ranks = Species〔 | subdivision = *''C. rara'' Marsh, 1892 *''C. maxima'' Brodkorb, 1963 *''C. minima'' Brodkorb, 1963 *''C. petra'' Hope, 2002 }} ''Cimolopteryx'' (meaning "Cretaceous wing"〔Holtz, Thomas R. Jr. (2008) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages'' (Winter 2010 Supplementary Information ) 〕) is a prehistoric bird genus from the late Cretaceous Period. Remains attributed to ''Cimolopteryx'' have been found in the Frenchman Formation of Saskatchewan, the Lance Formation of Wyoming, the Fox Hills Formation of Colorado and possibly the Hell Creek Formation of Montana. All date to the end of the Maastrichtian age, about million years ago.〔Hope, S. (2002). "The Mesozoic radiation of Neornithes." Pp. 339-388 in Chiappe, L.M. and Witmer, L. (eds.), ''Mesozoic Birds: Above the Heads of Dinosaurs.''〕 An additional specimen from the much earlier Dinosaur Park Formation of Alberta (mid Campanian age, about 75 million years ago) may belong to a new species of ''Cimolopteryx''.〔 ==Description and history== ''Cimolopteryx'' was a fairly small bird, with a maximum size about equal to that of a small gull.〔 It is known almost exclusively from a number of ''coracoids'' (a bone in the shoulder girdle). These have a distinct enough anatomy, however, to allow it to be distinguished from other birds, and even for distinct species to be recognized. The first such coracoid to be found (specimen number YMP 1845, in the collections of the Peabody Museum of Natural History) was first mentioned and informally named by paleontologist Othniel Charles Marsh in the footnote of an 1889 paper, but it was not validly described by him until 1892. Marsh also described a second species in the same paper, which he named ''Cimolopteryx retusa'', but this has since been recognized as a different kind of bird and reclassified as ''Palintropus retusus''.〔 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「Cimolopteryx」の詳細全文を読む スポンサード リンク
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