Endocranial morphology of three early-diverging ceratopsians and implications for the behavior and the evolution of the endocast in ceratopsians

doi:10.1017/pab.2024.25

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	Endocranial morphology of three early-diverging ceratopsians and implications for the behavior and the evolution of the endocast in ceratopsians
	Hu, Jinfeng 1; Xu, Xing2,3 ; Zhao, Qi 2; He, Yiming 4; Forster, Catherine A.5; Han, Fenglu1
	2024-10-30
发表期刊	PALEOBIOLOGY
ISSN	0094-8373
页码	13
通讯作者	Han, Fenglu(hanfl@cug.edu.cn)
摘要	Ceratopsian dinosaurs underwent great changes, including a shift of locomotion mode, enlarged horns and frills, and increased body size. These changes occur alongside the evolution of endocranial morphology and physiology such as the size and shape of the flocculus, hearing range, olfactory ratio, and the reptile encephalization quotient (REQ). However, the evolution of endocranial structures in early ceratopsians is still unclear because of a lack of information on the earliest ceratopsians. Here, we reconstructed the endocasts of three early-diverging ceratopsians including the Late Jurassic Yinlong, and the Early Cretaceous Liaoceratops and Psittacosaurus. These ceratopsians display obvious flocculi, large and separate olfactory bulbs, long and high anterior semicircular canals, and relatively long cochlear ducts. In the evolution of the earliest ceratopsians to early neoceratopsians, changes include the increasing size of the flocculus (which is reduced or absent in late-diverging ceratopsids), the attenuation of the semicircular canals, and the heightening of the anterior semicircular canal (which is shortened in late-diverging ceratopsids). The endocranial structures suggest early-diverging ceratopsians had a higher olfactory acuity and were adapted to hearing higher frequencies than late-diverging ceratopsians. Furthermore, the REQ suggests that Yinlong and Psittacosaurus were more highly encephalized than late-diverging ceratopsians and most extant reptiles. The angle of the lateral semicircular canal suggests that heads in ceratopsians display a transition from a forward posture to a more downward posture. Our new findings are significant for understanding the physiological changes during ceratopsian evolution and also have implications for the evolution of physiology in extant tetrapods.
DOI	10.1017/pab.2024.25
关键词[WOS]	LARGE MAMMALS ; HEAD POSTURE ; INNER-EAR ; BODY-MASS ; ANATOMY ; NEUROANATOMY ; ORIENTATION ; REPTILES ; HEARING ; ACUITY
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[42372036] ; 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	Biodiversity & Conservation ; Environmental Sciences & Ecology ; Evolutionary Biology ; Paleontology
WOS类目	Biodiversity Conservation ; Ecology ; Evolutionary Biology ; Paleontology
WOS记录号	WOS:001345997500001
出版者	CAMBRIDGE UNIV PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24036
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, 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.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjiang Museum Paleontol, Nanjing, Peoples R China 5.George Washington Univ, Dept Biol Sci, Washington, DC USA
推荐引用方式 GB/T 7714	Hu, Jinfeng,Xu, Xing,Zhao, Qi,et al. Endocranial morphology of three early-diverging ceratopsians and implications for the behavior and the evolution of the endocast in ceratopsians[J]. PALEOBIOLOGY,2024:13.
APA	Hu, Jinfeng,Xu, Xing,Zhao, Qi,He, Yiming,Forster, Catherine A.,&Han, Fenglu.(2024).Endocranial morphology of three early-diverging ceratopsians and implications for the behavior and the evolution of the endocast in ceratopsians.PALEOBIOLOGY,13.
MLA	Hu, Jinfeng,et al."Endocranial morphology of three early-diverging ceratopsians and implications for the behavior and the evolution of the endocast in ceratopsians".PALEOBIOLOGY (2024):13.