Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw
文献类型：期刊论文
| 作者 | Ma, Waisum1; Wang, Junyou2; Pittman, Michael1; Tan, Qingwei3; Tan, Lin2; Guo, Bin3; Xu, Xing4 |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2017-11-24 |
| 卷号 | 7 |
| DOI | 10.1038/s41598-017-15709-7 |
| 文献子类 | Article |
| 英文摘要 | The Oviraptorosauria are a group of theropod dinosaurs that diverged from the typical carnivorous theropod diet. It includes two main lineages -Caenagnathidae and Oviraptoridae -that display a number of differences in mandibular morphology, but little is known about their functional consequences, hampering our understanding of oviraptorosaurian dietary evolution. This study presents the first in-depth description of the giant toothless mandible of Gigantoraptor, the only wellpreserved stemward caenagnathid mandible. This mandible shows the greatest relative beak depth among caenagnathids, which is an adaptation seen in some modern birds for processing harder seeds. The presence of a lingual triturating shelf in caenagnathids more crownward than Gigantoraptor suggests a possible increased specialization towards shearing along this lineage. Like other oviraptorosaurs, the possession of a dorsally convex articular glenoid in Gigantoraptor indicates that propalinal jaw movement was probably an important mechanism for food processing, as in Sphenodon and dicynodonts. Oviraptorid mandibles were more suited for producing powerful bites (e. g. crushingrelated) compared to caenagnathids: oviraptorids generally possess a deeper, more downturned beak, a taller coronoid process prominence and a larger medial mandibular fossa. This disparity in caenagnathid and oviraptorid mandible morphology potentially suggests specialization towards two different feeding styles -shearing and crushing-related mechanisms respectively. |
| WOS关键词 | REPUBLIC-OF-CHINA ; INNER-MONGOLIA ; BITE FORCE ; BODY-SIZE ; THEROPODA OVIRAPTOROSAURIA ; MEGAHERBIVOROUS DINOSAURS ; CAENAGNATHID DINOSAURIA ; ERLIKOSAURUS-ANDREWSI ; ADAPTIVE EVOLUTION ; NORTH-AMERICA |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000416135000046 |
| 资助机构 | Faculty of Science of the University of Hong Kong ; HKU MOOC course Dinosaur Ecosystems ; National Science Foundation of China(41688103 ; 41120124002) |
| 源URL | [http://124.16.247.212/handle/311034/8057]  |
| 专题 | 古脊椎动物与古人类研究所_古低等脊椎动物研究室 |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Vertebrate Palaeontol Lab, Hong Kong, Hong Kong, Peoples R China 2.Longhao Inst Geol & Paleontol, Hohhot 010011, Nei Mongol, Peoples R China 3.Nei Mongol Museum Nat, Hohhot 010011, Nei Mongol, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Waisum,Wang, Junyou,Pittman, Michael,et al. Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw[J]. SCIENTIFIC REPORTS,2017,7. |
| APA | Ma, Waisum.,Wang, Junyou.,Pittman, Michael.,Tan, Qingwei.,Tan, Lin.,...&Xu, Xing.(2017).Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw.SCIENTIFIC REPORTS,7. |
| MLA | Ma, Waisum,et al."Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw".SCIENTIFIC REPORTS 7(2017). |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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