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

文献类型：期刊论文

作者Hu, Jinfeng4; Xu, Xing2,3; Li, Fuqiang1; Han, Fenglu4
刊名BMC ECOLOGY AND EVOLUTION
出版日期2024-04-16
卷号24期号:1页码:17
关键词Ornithischia Ornithopoda Jehol Biota Tooth replacement Cretaceous
DOI10.1186/s12862-024-02233-2
通讯作者Han, Fenglu(hanfl@cug.edu.cn)
英文摘要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.
WOS关键词CRANIAL ANATOMY ; DINOSAURIA ORNITHISCHIA ; JUVENILE SKULL ; PHYLOGENY ; DISPARITY ; ALLIGATOR
资助项目National Natural Science Foundation of China[YLSNHM01797]
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
语种英语
WOS记录号WOS:001204498600001
出版者BMC
资助机构National Natural Science Foundation of China
源URL[http://119.78.100.205/handle/311034/23616]  
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, Yifu Museum, Wuhan, Hubei, 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, Peoples R China
4.China Univ Geosci, Sch Earth Sci, 388 Lumo Rd, Wuhan 430074, 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.

入库方式： OAI收割

来源：古脊椎动物与古人类研究所

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