Relatively low tooth replacement rate in a sauropod dinosaur from the Early Cretaceous Ruyang Basin of central China

doi:10.7717/peerj.12361

IVPP-IR > 中科院古脊椎所（2000年以后）

	Relatively low tooth replacement rate in a sauropod dinosaur from the Early Cretaceous Ruyang Basin of central China
	Chang, Huali 1; You, Hai-Lu2,3,4 ; Xu, Li 1; Ma, Waisum 5; Gao, Diansong 1; Jia, Songhai 1; Xia, Mengli 1; Zhang, Jiming 1; Li, Yu 1; Wang, Xirui 1; Liu, Di 1; Li, Jie 1; Zhang, Jianhua 1; Yang, Lili 1; Wei, Xuefang 6
	2021-10-27
发表期刊	PEERJ
ISSN	2167-8359
卷号	9 页码:11
通讯作者	Chang, Huali(hualichang@qq.com) ; You, Hai-Lu(youhailu@ivpp.ac.cn)
摘要	Tooth replacement rate is an important feature related to feeding mechanics and food choices for dinosaurs. However, only a few data points are available for sauropod dinosaurs, partially due to rarity of relevant fossil material. Four somphospondylan sauropod species have been recovered from the Lower Cretaceous Aptian-Albian Haoling Formation in the Ruyang Basin, Henan Province of central China, but no cranial material has been reported except for a single crown. Here we report the discovery of the rostral portion of a left dentary with replacement teeth in its first five alveoli. Comparative anatomical study shows the partial dentary can be assigned to a member of early diverging somphospondylans. The non-destructive tooth length-based approach to estimating tooth formation time and replacement rate is adopted here. The estimated tooth replacement rate is 76 days, faster than that of Brachiosaurus (83 days) and much lower than typical late diverging lithostrotian titanosaurians (20 days). Thus, this discovery adds an intermediate tooth replacement rate in the evolution of titanosauriform sauropods and supports the idea that evolution of tooth replacement rate is Glade-specific. This discovery also provides more information to understand the Ruyang sauropod assemblage, which includes one of the most giant dinosaurs to have walked our Earth (Ruyangosaurus giganteus).
关键词	Sauropod Tooth replacement rate Early Cretaceous Ruyang Basin Henan
DOI	10.7717/peerj.12361
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41872021] ; National Natural Science Foundation of China[41702021] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; UCCL Grant, Universities' China Committee in London
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; UCCL Grant, Universities' China Committee in London
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000713971800004
出版者	PEERJ INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/19079
专题	中科院古脊椎所（2000年以后）
通讯作者	Chang, Huali; You, Hai-Lu
作者单位	1.Henan Nat Hist Museum, Zhengzhou, Henan, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 5.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England 6.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chang, Huali,You, Hai-Lu,Xu, Li,et al. Relatively low tooth replacement rate in a sauropod dinosaur from the Early Cretaceous Ruyang Basin of central China[J]. PEERJ,2021,9:11.
APA	Chang, Huali.,You, Hai-Lu.,Xu, Li.,Ma, Waisum.,Gao, Diansong.,...&Wei, Xuefang.(2021).Relatively low tooth replacement rate in a sauropod dinosaur from the Early Cretaceous Ruyang Basin of central China.PEERJ,9,11.
MLA	Chang, Huali,et al."Relatively low tooth replacement rate in a sauropod dinosaur from the Early Cretaceous Ruyang Basin of central China".PEERJ 9(2021):11.