气候变化领域集成服务门户(CCPortal): Snake-like limb loss in a Carboniferous amniote

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DOI	10.1038/s41559-022-01698-y
	Snake-like limb loss in a Carboniferous amniote
	Mann A.; Pardo J.D.; Maddin H.C.
发表日期	2022
ISSN	2397-334X
起始页码	614
结束页码	621
卷号	6 期号:5
英文摘要	Among living tetrapods, many lineages have converged on a snake-like body plan, where extreme axial elongation is accompanied by reduction or loss of paired limbs. However, when and how this adaptive body plan first evolved in amniotes remains poorly understood. Here, we provide insights into this question by reporting on a new taxon of molgophid recumbirostran, Nagini mazonense gen. et sp. nov., from the Francis Creek Shale (309–307 million years ago) of Illinois, United States, that exhibits extreme axial elongation and corresponding limb reduction. The molgophid lacks entirely the forelimb and pectoral girdle, thus representing the earliest occurrence of complete loss of a limb in a taxon recovered phylogenetically within amniotes. This forelimb-first limb reduction is consistent with the pattern of limb reduction that is seen in modern snakes and contrasts with the hindlimb-first reduction process found in many other tetrapod groups. Our findings suggest that a snake-like limb-reduction mechanism may be operating more broadly across the amniote tree. ? 2022, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
scopus关键词	animal; evolution; forelimb; hindlimb; phylogeny; Animals; Biological Evolution; Forelimb; Hindlimb; Phylogeny
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257073
作者单位	Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, United States; Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada; Department of Earth Sciences, Carleton University, Ottawa, ON, Canada
推荐引用方式 GB/T 7714	Mann A.,Pardo J.D.,Maddin H.C.. Snake-like limb loss in a Carboniferous amniote[J],2022,6(5).
APA	Mann A.,Pardo J.D.,&Maddin H.C..(2022).Snake-like limb loss in a Carboniferous amniote.Nature Ecology & Evolution,6(5).
MLA	Mann A.,et al."Snake-like limb loss in a Carboniferous amniote".Nature Ecology & Evolution 6.5(2022).