Developmental and evolutionary novelty in the serrated teeth of theropod dinosaurs

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題名:	Developmental and evolutionary novelty in the serrated teeth of theropod dinosaurs
作者:	張榮森;Brink, K. S.;Reisz, R. R.;LeBlanc, A. R. H.;Chang, R. S.;Lee, Y. C.;Chiang, C. C.;Huang, T.;Evans, D. C.
貢獻者:	理學院光電科學與工程學系
關鍵詞:	631/136/818;631/181/414;Animals;Biological Evolution;Dinosaurs;Feeding behavior;Humanities and Social Sciences;Lizards;Morphology;multidisciplinary;Predators;Science;Spectroscopy, Fourier Transform Infrared;Teeth;Tooth - anatomy & histology
日期:	2015-07-28
上傳時間:	2026-04-23 11:26:51 (UTC+8)
出版者:	Nature Publishing Group;London: Nature Publishing Group UK
摘要:	摘要： Tooth morphology and development can provide valuable insights into the feeding behaviour and evolution of extinct organisms. The teeth of Theropoda, the only clade of predominantly predatory dinosaurs, are characterized by ziphodonty, the presence of serrations (denticles) on their cutting edges. Known today only in varanid lizards, ziphodonty is much more pervasive in the fossil record. Here we present the first model for the development of ziphodont teeth in theropods through histological, SEM and SR-FTIR analyses, revealing that structures previously hypothesized to prevent tooth breakage instead first evolved to shape and maintain the characteristic denticles through the life of the tooth. We show that this novel complex of dental morphology and tissues characterizes Theropoda, with the exception of species with modified feeding behaviours, suggesting that these characters are important for facilitating the hypercarnivorous diet of most theropods. This adaptation may have played an important role in the initial radiation and subsequent success of theropods as terrestrial apex predators. 其他題名： Sci Rep 出版者： London: Nature Publishing Group UK 出版日期： 2015-07-28 出處： Scientific reports, 2015-07, Vol.5 (1), p.12338, Article 12338 資源來源： SpringerLink Journals Open Access 版權： The Author(s) 2015 版權： Copyright Nature Publishing Group Jul 2015 版權： Copyright © 2015, Macmillan Publishers Limited 2015 Macmillan Publishers Limited 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep12338 識別號： PMID: 26216577
顯示於類別:	[光電科學與工程學系] 期刊論文

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