Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw

doi:10.1038/s41598-017-15709-7

IVPP-IR > 古低等脊椎动物研究室

	Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw
	Ma, Waisum 1; Wang, Junyou 2; Pittman, Michael 1; Tan, Qingwei 3; Tan, Lin 2; Guo, Bin 3; Xu, Xing 4
	2017-11-24
发表期刊	SCIENTIFIC REPORTS
卷号	7
文章类型	Article
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标题词	Science & Technology
DOI	10.1038/s41598-017-15709-7
关键词[WOS]	REPUBLIC-OF-CHINA ; INNER-MONGOLIA ; BITE FORCE ; BODY-SIZE ; THEROPODA OVIRAPTOROSAURIA ; MEGAHERBIVOROUS DINOSAURS ; CAENAGNATHID DINOSAURIA ; ERLIKOSAURUS-ANDREWSI ; ADAPTIVE EVOLUTION ; NORTH-AMERICA
收录类别	SCI
语种	英语
项目资助者	Faculty of Science of the University of Hong Kong ; HKU MOOC course Dinosaur Ecosystems ; National Science Foundation of China(41688103 ; 41120124002)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000416135000046
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/8057
专题	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).

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