Tooth replacement in the early-diverging neornithischian <i>Jeholosaurus shangyuanensis</i> and implications for dental evolution and herbivorous adaptation in Ornithischia

doi:10.1186/s12862-024-02233-2

IVPP-IR

	*Tooth replacement in the early-diverging neornithischian Jeholosaurus shangyuanensis* and implications for dental evolution and herbivorous adaptation in Ornithischia**
	Hu, Jinfeng 1; Xu, Xing2,3 ; Li, Fuqiang 4; Han, Fenglu1
	2024-04-16
发表期刊	BMC ECOLOGY AND EVOLUTION
卷号	24 期号:1 页码:17
通讯作者	Han, Fenglu(hanfl@cug.edu.cn)
摘要	Background Tooth replacement patterns of early-diverging ornithischians, which are important for understanding the evolution of the highly specialized dental systems in hadrosaurid and ceratopsid dinosaurs, are poorly known. The early-diverging neornithischian Jeholosaurus, a small, bipedal herbivorous dinosaur from the Early Cretaceous Jehol Biota, is an important taxon for understanding ornithischian dental evolution, but its dental morphology was only briefly described previously and its tooth replacement is poorly known. Results CT scanning of six specimens representing different ontogenetic stages of Jeholosaurus reveals significant new information regarding the dental system of Jeholosaurus, including one or two replacement teeth in nearly all alveoli, relatively complete tooth resorption, and an increase in the numbers of alveoli and replacement teeth during ontogeny. Reconstructions of Zahnreihen indicate that the replacement pattern of the maxillary dentition is similar to that of the dentary dentition but with a cyclical difference. The maxillary tooth replacement rate in Jeholosaurus is probably 46 days, which is faster than that of most other early-diverging ornithischians. During the ontogeny of Jeholosaurus, the premaxillary tooth replacement rate slows from 25 days to 33 days with similar daily dentine formation. Conclusions The tooth replacement rate exhibits a decreasing trend with ontogeny, as in Alligator. In a phylogenetic context, fast tooth replacement and multi-generation replacement teeth have evolved at least twice independently in Ornithopoda, and our analyses suggest that the early-diverging members of the major ornithischian clades exhibit different tooth replacement patterns as an adaption to herbivory.
关键词	Ornithischia Ornithopoda Jehol Biota Tooth replacement Cretaceous
DOI	10.1186/s12862-024-02233-2
关键词[WOS]	CRANIAL ANATOMY ; DINOSAURIA ORNITHISCHIA ; JUVENILE SKULL ; PHYLOGENY ; DISPARITY ; ALLIGATOR
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[YLSNHM01797]
项目资助者	National Natural Science Foundation of China
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS类目	Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS记录号	WOS:001204498600001
出版者	BMC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23617
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, 388 Lumo Rd, Wuhan 430074, Hubei, Peoples R China 2.Yunnan Univ, Ctr Vertebrate Evolutionary Biol, Kunming, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 4.China Univ Geosci, Yifu Museum, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Hu, Jinfeng,Xu, Xing,Li, Fuqiang,et al. Tooth replacement in the early-diverging neornithischian Jeholosaurus shangyuanensis and implications for dental evolution and herbivorous adaptation in Ornithischia[J]. BMC ECOLOGY AND EVOLUTION,2024,24(1):17.
APA	Hu, Jinfeng,Xu, Xing,Li, Fuqiang,&Han, Fenglu.(2024).Tooth replacement in the early-diverging neornithischian Jeholosaurus shangyuanensis and implications for dental evolution and herbivorous adaptation in Ornithischia.BMC ECOLOGY AND EVOLUTION,24(1),17.
MLA	Hu, Jinfeng,et al."Tooth replacement in the early-diverging neornithischian Jeholosaurus shangyuanensis and implications for dental evolution and herbivorous adaptation in Ornithischia".BMC ECOLOGY AND EVOLUTION 24.1(2024):17.