KMS Institute of Vertebrate Paleontology and Paleoanthropology
| Ultramicrostructural reductions in teeth: implications for dietary transition from non-avian dinosaurs to birds | |
Li,Zhiheng1,2; Wang,Chun-Chieh3; Wang,Min1,2; Chiang,Cheng-Cheng3; Wang,Yan4; Zheng,Xiaoting5; Huang,E-Wen6; Hsiao,Kiko7; 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. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Ultramicrostructural（1613KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论