Bone histology of the non-iguanodontian ornithopodJeholosaurus shangyuanensisand its implications for dinosaur skeletochronology and development

doi:10.1080/02724634.2020.1768538

	Bone histology of the non-iguanodontian ornithopodJeholosaurus shangyuanensisand its implications for dinosaur skeletochronology and development
	Han, Fenglu 3,4; Zhao, Qi 4; Stiegler, Josef 1,2; Xu, Xing 4
刊名	JOURNAL OF VERTEBRATE PALEONTOLOGY
	2020-08-06
页码	13
ISSN号	0272-4634
DOI	10.1080/02724634.2020.1768538
通讯作者	Han, Fenglu(hanfl@cug.edu.cn)
英文摘要	Bone histology has provided valuable information on the life history of dinosaurs, and the presence of growth lines provides useful information for age estimation, growth variation, and the reconstruction of paleobehavior. Here, we present new data recovered from five individuals of the non-iguanodontian ornithopod dinosaurJeholosaurus shangyuanensisfrom the Early Cretaceous Jehol Biota. These specimens, ranging in body length from 16 to 62 cm, represent early juvenile, late juvenile, and subadult ontogenetic stages. The bones ofJeholosaurusmainly consist of fibrolamellar tissue, which is similar to that of other non-iguanodontian ornithopods; however, parallel-fibered bone and lamellar bone tissues were also deposited in early juvenile through subadult individuals, suggesting relatively slow growth rates. Parallel-fibered bone is only regionally present in the juvenile but is well developed throughout the outermost cortex of the subadult. Skeletochronology indicates that these specimens range in age from one to five years old. Analyzing bone tissue distribution and lines of arrested growth (LAGs) in these specimens, we estimate thatJeholosaurusreached sexual maturity at two to four years old. The largest individual (IVPP V15939) displays an apparently higher growth rate during the first two years, which is abruptly reduced in the following years, suggesting a distinct growth pattern that may be related to sexual dimorphism or variable environmental conditions. Finally, the largest specimen displays parallel-fibered bone tissue but lacks an external fundamental system (EFS) near the periphery, suggesting that it was still growing but was approaching somatic maturity at death.
资助项目	National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41972021] ; National Natural Science Foundation of China[91514302] ; National Natural Science Foundation of China[41120124002] ; National Natural Science Foundation of China[41502018] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB18030504] ; Newton Advanced Fellowships of Royal Society[NA160290]
WOS关键词	GROWTH-PATTERNS ; SEXUAL-MATURITY ; LIFE-HISTORY ; AGE ESTIMATION ; POPULATION ; DIMORPHISM ; DYNAMICS ; MICROSTRUCTURE ; CERATOPSIA ; EVOLUTION
WOS研究方向	Paleontology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000558508100001
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Newton Advanced Fellowships of Royal Society
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17939]
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Han, Fenglu
作者单位	1.George Washington Univ, Dept Biol Sci, 2029 G St NW, Washington, DC 20052 USA 2.SUNY Stony Brook, Dept Anat Sci, Stony Brook, NY 11794 USA 3.China Univ Geosci Wuhan, 1Sch Earth Sci, 388 Lumo Rd, Wuhan 430074, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, 142 Xizhimenwai St, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Han, Fenglu,Zhao, Qi,Stiegler, Josef,et al. Bone histology of the non-iguanodontian ornithopodJeholosaurus shangyuanensisand its implications for dinosaur skeletochronology and development[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2020:13.
APA	Han, Fenglu,Zhao, Qi,Stiegler, Josef,&Xu, Xing.(2020).Bone histology of the non-iguanodontian ornithopodJeholosaurus shangyuanensisand its implications for dinosaur skeletochronology and development.JOURNAL OF VERTEBRATE PALEONTOLOGY,13.
MLA	Han, Fenglu,et al."Bone histology of the non-iguanodontian ornithopodJeholosaurus shangyuanensisand its implications for dinosaur skeletochronology and development".JOURNAL OF VERTEBRATE PALEONTOLOGY (2020):13.