Bone histology and growth curve of the earliest ceratopsian <i>Yinlong downsi</i> from the Upper Jurassic of Junggar Basin, Northwest China

doi:10.7717/peerj.18761

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	*Bone histology and growth curve of the earliest ceratopsian Yinlong downsi* from the Upper Jurassic of Junggar Basin, Northwest China**
	Han, Fenglu1 ; Zhao, Qi 2; Hu, Jinfeng 1; Xu, Xing2,3
	2024-12-19
发表期刊	PEERJ
ISSN	2167-8359
卷号	12 页码:28
通讯作者	Han, Fenglu(hanfl@cug.edu.cn)
摘要	Yinlong downsi, the earliest known ceratopsian, is represented by dozens of specimens of different sizes collected from the Upper Jurassic of the Junggar Basin, northwestern China. Here, we present the first comprehensive study on the bone histology of Yinlong downsi based on ten specimens varying in size. Four ontogenetic stages are recognized: early juvenile, late juvenile, subadult, and adult. The reconstructed growth curve suggests that Yinlong may reach sexual maturity at 6 years old, which is earlier than that of the well-studied early-diverging ceratopsian Psittacosaurus (9 years old) but later than ceratopsids (about 3 to 5 years old). This may indicate that sexual maturity begins earlier during the evolution of ceratopsians, and that the giant size of ceratopsids is acquired by accelerating growth rates. The cortex of the tibia mainly consists of fibrolamellar bone tissues, but parallel-fibered bone and lines of arrested growth (LAGs) are very common throughout ontogeny, suggesting a moderate growth rate. Quantitative analysis indicates that Yinlong has a maximum growth rate similar to those of other small-sized dinosaurs such as Psittacosaurus, Dysalotosaurus, and Troodon, and their maximum growth rates are higher than those of extant squamates and crocodiles but lower than those of extant mammals and large dinosaurs. This suggests that body size plays a more important role in growth rate than other factors such as phylogenetic position and/or diet among non-avian dinosaurs.
关键词	Bone histology Dinosaur Ceratopsia Jurassic Junggar Basin China Yinlong Growth curve
DOI	10.7717/peerj.18761
关键词[WOS]	GANSU PROVINCE ; NEOCERATOPSIAN DINOSAUR ; AURORACERATOPS-RUGOSUS ; BODY-SIZE ; ORNITHISCHIA CERATOPSIA ; DETERMINATE GROWTH ; EARLY EVOLUTION ; DYNAMICS ; PATTERNS ; HISTORY
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41972021] ; National Natural Science Foundation of China[42288201] ; National Natural Science Foundation of China[42372046] ; National Natural Science Foundation of China[42072008] ; National Natural Science Foundation of China[42272020]
项目资助者	National Natural Science Foundation of China
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001438217000009
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/311034/24336
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.China Univ Geosci, Sch Earth Sci, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 3.Yunnan Univ, Ctr Vertebrate Evolutionary Biol, Kunming, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Han, Fenglu,Zhao, Qi,Hu, Jinfeng,et al. Bone histology and growth curve of the earliest ceratopsian Yinlong downsi from the Upper Jurassic of Junggar Basin, Northwest China[J]. PEERJ,2024,12:28.
APA	Han, Fenglu,Zhao, Qi,Hu, Jinfeng,&Xu, Xing.(2024).Bone histology and growth curve of the earliest ceratopsian Yinlong downsi from the Upper Jurassic of Junggar Basin, Northwest China.PEERJ,12,28.
MLA	Han, Fenglu,et al."Bone histology and growth curve of the earliest ceratopsian Yinlong downsi from the Upper Jurassic of Junggar Basin, Northwest China".PEERJ 12(2024):28.