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Convergent evolution of diverse jaw joints in mammaliamorphs

文献类型：期刊论文

作者Mao, Fangyuan3,4; Jiang, Shan5,6; Liu, Jun3; Ren, Jicheng3; Ye, Yong5,6; Liu, Yu5,6; Shen, Xin5,6; Wang, Tao7; Wang, Guofu8; Wang, Ping1
刊名NATURE
出版日期2025-09-24
页码23
ISSN号0028-0836
DOI10.1038/s41586-025-09572-0
通讯作者Mao, Fangyuan(maofangyuan@ivpp.ac.cn) ; Meng, Jin(jmeng@amnh.org)
英文摘要The evolution of a single-dentary-boned lower jaw and its secondary craniomandibular articulation between the dentary condyle and the squamosal glenoid has been regarded as a pivotal vertebrate innovation and defining mammalian trait1, 2, 3, 4, 5, 6-7. Here we report two mammaliamorphs with novel shapes of secondary jaw joint, offering insight into the evolution of the mammalian jaw. The first, Polistodon8, a Middle Jurassic herbivorous tritylodontid with a relatively large body size and a lifestyle that is likely to have been fossorial, uniquely evolved a dentary-jugal articulation. The second, an Early Jurassic morganucodontan, exhibits a dentary-squamosal joint that lacks a bulbous condyle, supporting the hypothesis that the mammalian dentary condyle was formed by expansion of the lateral ridge of the dentary9. These diverse joints reflect repeated evolutionary experimentation in advanced cynodonts, in which secondary jaw joints arose independently7,10, and in which the load-bearing dentary-squamosal joint is a synapomorphy of mammaliaforms. Although body miniaturization might have driven this transformation11, our findings indicate that other factors were involved, such as jaw-muscle reorganization, feeding ecology and masticatory behaviour7,12, 13, 14, 15, 16-17. The ecomorphological diversity of these taxa suggest that phenotypic plasticity and environmentally induced morphological changes18, 19-20 could have shaped jaw-joint evolution, emphasizing how ecological pressures and developmental flexibility guided the diversification of jaw structures in mammalian ancestors.
WOS关键词ORIGIN ; TRITHELEDONTIDAE ; TRITYLODONTIDAE ; PHYLOGENY ; SKULL
资助项目National Natural Science Foundation of China[42122010] ; National Natural Science Foundation of China[42288201] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2023017] ; Project Foundation of the Sichuan Provincial Cultural Heritage Administration[SCWW2023A02] ; Chongqing Municipal Planning and Natural Resource Bureau[ZC-2021018]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001577776800001
出版者NATURE PORTFOLIO
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Project Foundation of the Sichuan Provincial Cultural Heritage Administration ; Chongqing Municipal Planning and Natural Resource Bureau
源URL[http://119.78.100.205/handle/311034/25013]  
专题中国科学院古脊椎动物与古人类研究所
通讯作者Mao, Fangyuan; Meng, Jin
作者单位1.Chongqing Inst Paleontol Chongqing, Chongqing Key Lab Paleontol & Paleoenvironm Coevol, Chongqing, Peoples R China
2.CUNY, Earth & Environm Sci, Grad Ctr, New York, NY 10016 USA
3.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
4.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA
5.Zigong Dinosaur Museum, Res Ctr Jurass Stratig & Paleontol, Zigong, Peoples R China
6.Sichuan Prov Dept Culture & Tourism, Key Lab Dinosaur Res & Protect, Zigong, Peoples R China
7.Bur Land & Resources Lufeng Cty, Lufeng, Peoples R China
8.Fossil Res Ctr Chuxiong Prefecture, Chuxiong, Peoples R China
推荐引用方式
GB/T 7714		 Mao, Fangyuan,Jiang, Shan,Liu, Jun,et al. Convergent evolution of diverse jaw joints in mammaliamorphs[J]. NATURE,2025:23.
APA Mao, Fangyuan.,Jiang, Shan.,Liu, Jun.,Ren, Jicheng.,Ye, Yong.,...&Meng, Jin.(2025).Convergent evolution of diverse jaw joints in mammaliamorphs.NATURE,23.
MLA Mao, Fangyuan,et al."Convergent evolution of diverse jaw joints in mammaliamorphs".NATURE (2025):23.

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来源：古脊椎动物与古人类研究所

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