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Reevaluation of the Dentary Structures of Caenagnathid Oviraptorosaurs (Dinosauria, Theropoda)
Wang, Shuo1,2; Zhang, Qiyue1; Yang, Rui1
2018-01-10
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume8Pages:9
Abstract

Among the characters of caenagnathid oviraptorosaurians, the lateral occlusal grooves and ridges on the occlusal surface of the jaw bones often receive special attention. Recent studies demonstrated that ontogenetic edentulism is present in caenagnathids, and therefore the lateral occlusal grooves and ridges are vestigial alveoli and interdental septa, respectively. In the present paper, the dentary structures of caenagnathids were reevaluated based on CT images of Caenagnathiasia sp. IVPP V20377. Several previously unknown features including crateriform vestigial alveoli, the morphology of the dentary interior hollow space, and the paired blind tubes beneath the dentary symphyseal shelf are recognized. Current lines of evidence suggest different jaw bone morphologies are likely produced by various tooth reduction patterns, which indicates ontogenetic dietary shift, if once presented in caenagnathids and Sapeornis, may have been different from the condition seen in Limusaurus. The 3D images of dentary interior spaces suggest that while tooth reduction progresses, the empty alveoli are partially modified into structures accommodating blood vessels that nourish the rhamphotheca, probably representing a functional compensation for the insufficient blood supply in toothed jaw bones.

DOI10.1038/s41598-017-18703-1
Language英语
WOS KeywordGobi Desert ; China ; Mongolia ; Bird ; Embryos ; Uzbekistan ; Specimens ; Osteology ; Alberta ; Canada
Funding ProjectNational Natural Science Foundation of China[41602013] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[173125] ; Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-Year Plan[CIT TCD201804071] ; Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-Year Plan[IDHT20180518] ; Youth Innovative Research Team Project of Capital Normal University
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000419673100027
Funding OrganizationNational Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences ; Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-Year Plan ; Youth Innovative Research Team Project of Capital Normal University
PublisherNATURE PUBLISHING GROUP
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/18774
Collection中国科学院南京地质古生物研究所
Corresponding AuthorWang, Shuo
Affiliation1.Capital Normal Univ, Coll Life Sci, Lab Vertebrate Evolut, Beijing 100048, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Wang, Shuo,Zhang, Qiyue,Yang, Rui. Reevaluation of the Dentary Structures of Caenagnathid Oviraptorosaurs (Dinosauria, Theropoda)[J]. SCIENTIFIC REPORTS,2018,8:9.
APA Wang, Shuo,Zhang, Qiyue,&Yang, Rui.(2018).Reevaluation of the Dentary Structures of Caenagnathid Oviraptorosaurs (Dinosauria, Theropoda).SCIENTIFIC REPORTS,8,9.
MLA Wang, Shuo,et al."Reevaluation of the Dentary Structures of Caenagnathid Oviraptorosaurs (Dinosauria, Theropoda)".SCIENTIFIC REPORTS 8(2018):9.
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