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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 Spondylosoma ： ウィキペディア英語版 Spondylosoma ''Spondylosoma'' (meaning "vertebra body") is a genus of archosaur of uncertain affinities from the late Ladinian-age Middle Triassic Lower Santa Maria Formation in Geopark of Paleorrota, Brazil. Recent studies have gone back and forth on its identity, suggesting rauisuchian or basal saurischian dinosaur. If it was a dinosaur, it would be the oldest. ==History== Friedrich von Huene based the genus on a fragmentary postcranial skeleton held at the University of Tübingen. This skeleton includes two teeth, two cervical vertebrae, four dorsal vertebrae, three sacral vertebrae, scapulae, part of a humerus, part of a femur, and part of a pubis. At the time, he thought it was a prosauropod.〔von Huene, F. (1942). ''Die fossilen Reptilien des südamerikanischen Gondwanalandes.'' C.H. Beck:Munich, 342 p. ()〕 With the discovery of basal dinosaur ''Staurikosaurus'', ''Spondylosoma'' drew attention as a possible relative. Authors have gone back and forth on the question, considering it either as a basal dinosaur, or as a "thecodont" or other basal archosaur. The two most recent papers to address it illustrate this clearly: in 2000, Peter Galton claimed that it lacks dinosaurian characteristics and was probably a rauisuchian,〔Galton, P.M. (2000). Are ''Spondylosoma'' and ''Staurikosaurus'' (Santa Maria Formation, Middle-Upper Triassic, Brasil) the oldest saurischian dinosaurs? ''Palaontologische Zeitschrift'' 74(3):393-423.〕 whereas in 2004 Max Langer disputed this and included ''Spondylosoma'' as a possible basal dinosaur similar to the herrerasaurs (but did not firmly rule out raisuchian affinities).〔Langer, M.C. (2004). Basal Saurischia. In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). ''The Dinosauria'' (second edition). University of California Press:Berkeley, 25-46. ISBN 0-520-24209-2〕 This debate will probably continue until better remains are found and described. 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「Spondylosoma」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.