Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds

doi:10.1186/s12862-020-01611-w

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	Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds
	Li,Zhiheng 1,2; Wang,Chun-Chieh 3; Wang,Min 1,2; Chiang,Cheng-Cheng 3; Wang,Yan 4; Zheng,Xiaoting 5; Huang,E-Wen 6; Hsiao,Kiko 7; Zhou,Zhonghe 1,2
刊名	BMC Evolutionary Biology
	2020-04-21
卷号	20 期号:1 页码:8
关键词	Tooth Avialan Feeding ecology Non-avian dinosaurs
DOI	10.1186/s12862-020-01611-w
英文摘要	AbstractBackgroundTooth morphology within theropod dinosaurs has been extensively investigated and shows high disparity throughout the Cretaceous. Changes or diversification in feeding ecology, i.e., adoption of an herbivorous diet (e.g., granivorous), is proposed as a major driver of tooth evolution in Paraves (e.g., Microraptor, troodontids and avialans). Here, we studied the microscopic features of paravian non-avian theropod and avialan teeth using high-spatial-resolution synchrotron transmission X-ray microscopy and scanning electron microscopy.ResultsWe show that avialan teeth are characterized by the presence of simple enamel structures and a lack of porous mantle dentin between the enamel and orthodentin. Reduced internal structures of teeth took place independently in Early Cretaceous birds and a Microraptor specimen, implying that shifts in diet in avialans from that of closely related dinosaurs may correlate with a shift in feeding ecology during the transition from non-avian dinosaurs to birds.ConclusionDifferent lines of evidence all suggest a large reduction in biting force affecting the evolution of teeth in the dinosaur-bird transition. Changes in teeth microstructure and associated dietary shift may have contributed to the early evolutionary success of stemward birds in the shadow of other non-avian theropods.
语种	英语
出版者	BioMed Central
WOS记录号	BMC:10.1186/S12862-020-01611-W
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/16648]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Li,Zhiheng; Wang,Chun-Chieh
作者单位	1.Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences; Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences 2.CAS Center for Excellence in Life and Paleoenvironment 3.National Synchrotron Radiation Research Center 4.Linyi University; Institute of Geology and Paleontology 5.Tianyu Natural History Museum of Shandong 6.National Chiao Tung University; Department of Materials Science and Engineering 7.Mr. Fossil Institute
推荐引用方式 GB/T 7714	Li,Zhiheng,Wang,Chun-Chieh,Wang,Min,et al. Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds[J]. BMC Evolutionary Biology,2020,20(1):8.
APA	Li,Zhiheng.,Wang,Chun-Chieh.,Wang,Min.,Chiang,Cheng-Cheng.,Wang,Yan.,...&Zhou,Zhonghe.(2020).Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds.BMC Evolutionary Biology,20(1),8.
MLA	Li,Zhiheng,et al."Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds".BMC Evolutionary Biology 20.1(2020):8.