Enlargement of sternum traits facilitated the evolution of powered flight in birds
文献类型：期刊论文
| 作者 | Lowi-Merri, Talia M.1,2,6; Benson, Roger3; Hu, Han4; O'Connor, Jingmai5; Claramunt, Santiago2,6; Evans, David C.2,6 |
| 刊名 | NATURE ECOLOGY & EVOLUTION
 |
| 出版日期 | 2025-07-24 |
| 页码 | 19 |
| ISSN号 | 2397-334X |
| DOI | 10.1038/s41559-025-02795-4 |
| 通讯作者 | Lowi-Merri, Talia M.(talialowimerri@gmail.com) |
| 英文摘要 | An enlarged sternum with a prominent keel is a central feature of the flight apparatus of modern birds. However, sterna of near-bird dinosaurs (Pennaraptora) and early avialans are either substantially different from those of living birds or absent altogether, raising questions about how specialized sternal structures evolved in birds and how they are related to function. This remains poorly understood because of the fragmentary nature of the fossil record, and the challenges in inferring form and function from crushed fossils. We use ancestral character estimations to trace sternal trait acquisition through the bird stem group, and multivariate phylogenetic regressions to analyse relationships between sternum morphology, body mass and flight capabilities. We find that sternum evolution was episodic: basal members of Pennaraptora had proportionally small sterna, which became larger and more craniocaudally elongated in Avialae. This enlargement precedes the appearance of a midline ridge, a possible precursor of the sternal keel, in Pygostylia. Sternum size increased again in crownward Ornithuromorpha, alongside a fully formed sternal keel and enlarged caudal projections, both critical areas of flight muscle attachment. Sternal experimentation in relation to flight characteristics occurs several times throughout Pennaraptora, including within Paraves and Enantiornithes, indicating that powered flight may have evolved several times before proliferating in crown-group birds. |
| WOS关键词 | SAPEORNIS-CHAOYANGENSIS ; CONFUCIUSORNIS-SANCTUS ; ADAPTIVE RADIATION ; BASAL BIRDS ; ORIGIN ; ARCHAEOPTERYX ; CHINA ; AVES ; MORPHOLOGY ; DINOSAURS |
| 资助项目 | Natural Sciences and Engineering Research Council of Canada (NSERC)[PGSD3-547147-2020] ; NSERC[RGPIN-2018-06788] ; NSERC[RGPIN-2018-06747] ; European Union[677774] |
| WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:001534682800001 |
| 出版者 | NATURE PORTFOLIO |
| 资助机构 | Natural Sciences and Engineering Research Council of Canada (NSERC) ; NSERC ; European Union |
| 源URL | [http://119.78.100.205/handle/311034/24409]  |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Lowi-Merri, Talia M. |
| 作者单位 | 1.New York Inst Technol, Coll Osteopath Med, Dept Anat, Old Westbury, NY 11545 USA 2.Royal Ontario Museum, Dept Nat Hist, Toronto, ON, Canada 3.Amer Museum Nat Hist, Div Paleontol, New York, NY USA 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 5.Field Museum Nat Hist, Negaunee Integrat Res Ctr, Chicago, IL USA 6.Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON, Canada |
| 推荐引用方式 GB/T 7714 | Lowi-Merri, Talia M.,Benson, Roger,Hu, Han,et al. Enlargement of sternum traits facilitated the evolution of powered flight in birds[J]. NATURE ECOLOGY & EVOLUTION,2025:19. |
| APA | Lowi-Merri, Talia M.,Benson, Roger,Hu, Han,O'Connor, Jingmai,Claramunt, Santiago,&Evans, David C..(2025).Enlargement of sternum traits facilitated the evolution of powered flight in birds.NATURE ECOLOGY & EVOLUTION,19. |
| MLA | Lowi-Merri, Talia M.,et al."Enlargement of sternum traits facilitated the evolution of powered flight in birds".NATURE ECOLOGY & EVOLUTION (2025):19. |
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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