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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 Antrodemus ： ウィキペディア英語版 Antrodemus ''Antrodemus'' is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic Morrison Formation of Middle Park, Colorado. It contains one species, ''Antrodemus valens'', first described and named as a species of ''Poekilopleuron'' by Joseph Leidy in 1870. The first described fossil specimen was a bone obtained secondhand by Ferdinand Vandiveer Hayden in 1869. It came from Middle Park, near Granby, Colorado, probably from Morrison Formation rocks. The locals had identified such bones as petrified horse hooves. Hayden sent his specimen to Joseph Leidy, who identified it as half of a tail vertebra, and tentatively assigned it to the European dinosaur genus ''Poekilopleuron'' as ''Poicilopleuron'' () ''valens''. He later decided it deserved its own genus, ''Antrodemus''. In 1920, Charles W. Gilmore came to the conclusion that the tail vertebra named ''Antrodemus'' by Leidy was indistinguishable from those of ''Allosaurus'', and that ''Antrodemus'' should be the preferred name because, as the older name, it had priority. ''Antrodemus'' became the accepted name for this familiar genus for over fifty years, until James Madsen published on the Cleveland-Lloyd specimens of ''Allosaurus'' and concluded that name should be used because ''Antrodemus'' was based on material with poor, if any, diagnostic features and locality information (for example, the geological formation that the single bone of ''Antrodemus'' came from is unknown). Subsequent authors have agreed with this assessment and have considered ''Antrodemus'' a ''nomen dubium''.〔Paul, G.S. and Carpenter, K. (2010). "Case 3506: ''Allosaurus'' Marsh, 1877 (Dinosauria, Theropoda): proposed conservation of usage by designation of a neotype for its type species ''Allosaurus fragilis'' Marsh, 1877." ''Bulletin of Zoological Nomenclature'', 67(1): 53-56. ()〕 ==References== 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「Antrodemus」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.