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

doi:10.1186/s12862-020-01611-w

IVPP-IR > 中科院古脊椎所（2000年以后）

	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,Zhonghe1,2
	2020-04-21
发表期刊	BMC Evolutionary Biology
卷号	20 期号:1 页码:8
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.
关键词	Tooth Avialan Feeding ecology Non-avian dinosaurs
DOI	10.1186/s12862-020-01611-w
语种	英语
WOS记录号	BMC:10.1186/s12862-020-01611-w
出版者	BioMed Central
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/16649
专题	中科院古脊椎所（2000年以后）
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.

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