First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Avifauna

doi:10.1016/j.cretres.2024.105867

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	First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Avifauna
	Wang, Xiaoli 1,2,3; Clark, Alexander 4,5; O'Connor, Jingmai K.5; Zhang, Xiangyu 1,2; Wang, Xing 1,2; Zheng, Xiaoting 1,2; Zhou, Zhonghe6,7
	2024-07-01
发表期刊	CRETACEOUS RESEARCH
ISSN	0195-6671
卷号	159 页码:14
通讯作者	Clark, Alexander(adclark@uchicago.edu)
摘要	Among Mesozoic birds, enantiornithines exhibit great morphological variation, which likely reflects their species diversity, range, and overall success throughout the Cretaceous. The majority of enantiornithines come from the Lower Cretaceous Jehol deposits (130-120 Ma) in northeastern China. In contrast to living birds, most enantiornithines were fully toothed. However, the rostral lengths, appendicular proportions, and pedal morphologies of extant birds can still inform on possible diet, flight mode, and ecology. Both partial (e.g., Longipterygidae) and complete tooth loss (e.g., Yuornis, Gobipteryx) are observed among enantiornithines, with edentulous rostra previously restricted to Upper Cretaceous taxa. Here, we describe the first edentulous enantiornithine from the Lower Cretaceous, Imparavis attenboroughi gen. et sp. nov., indicating a toothless beak evolved in this group 48 Ma earlier than previously recognized. Additionally, we reinterpret Chiappeavis as edentulous which together with the discovery of Imparavis indicates the complete loss of teeth in enantiornithines was not uncommon although still less frequent than observed in ornithuromorphs. The absence of gastroliths in all known enantiornithines suggests that the loss of teeth evolved under different pressures in these two ornithothoracine clades. Differences in rostral occlusion between Imparavis and Chiappeavis suggest they utilized different foraging strategies and possibly diet. Appendicular morphology in Imparavis suggest the capacity for relatively high wing beat frequency and powerful take -off capabilities. Together with the morphology of the hindlimb, we suggest Imparavis was primarily a terrestrial forager that could utilize sudden bursts of flight to escape into arboreal settings as a prey evasion strategy. (c) 2024 Elsevier Ltd. All rights reserved.
关键词	Enantiornithines Edentulism Tooth loss Mesozoic birds Lower Cretaceous Jehol biota Paleoecology
DOI	10.1016/j.cretres.2024.105867
关键词[WOS]	LEG MORPHOLOGY ; BIRD AVES ; BODY-SIZE ; CHINA ; EVOLUTION ; ANATOMY ; DIVERSITY ; SPECIMEN ; PROVINCE ; INSIGHT
收录类别	SCI
语种	英语
WOS研究方向	Geology ; Paleontology
WOS类目	Geology ; Paleontology
WOS记录号	WOS:001209607100001
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23613
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Clark, Alexander
作者单位	1.Linyi Univ, Inst Geol & Paleontol, Linyi 276005, Peoples R China 2.Shandong Tianyu Museum Nat, Pingyi 273300, Peoples R China 3.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 4.Univ Chicago, Comm Evolutionary Biol, Chicago, IL 60637 USA 5.Field Museum Nat Hist, Negaunee Integrat Resource Ctr, 1400 S Dusable Lake Shore Dr, Chicago, IL 60605 USA 6.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 7.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaoli,Clark, Alexander,O'Connor, Jingmai K.,et al. First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Avifauna[J]. CRETACEOUS RESEARCH,2024,159:14.
APA	Wang, Xiaoli.,Clark, Alexander.,O'Connor, Jingmai K..,Zhang, Xiangyu.,Wang, Xing.,...&Zhou, Zhonghe.(2024).First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Avifauna.CRETACEOUS RESEARCH,159,14.
MLA	Wang, Xiaoli,et al."First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Avifauna".CRETACEOUS RESEARCH 159(2024):14.