气候变化领域集成服务门户(CCPortal): Recent synchronous radiation of a living fossil

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DOI	10.1126/science.1209926
	Recent synchronous radiation of a living fossil
	Nagalingum N.S.; Marshall C.R.; Quental T.B.; Rai H.S.; Little D.P.; Mathews S.
发表日期	2011
ISSN	0036-8075
起始页码	796
结束页码	799
卷号	334 期号:6057
英文摘要	Modern survivors of previously more diverse lineages are regarded as living fossils, particularly when characterized by morphological stasis. Cycads are often cited as a classic example, reaching their greatest diversity during the Jurassic-Cretaceous (199.6 to 65.5 million years ago) then dwindling to their present diversity of ∼300 species as flowering plants rose to dominance. Using fossil-calibrated molecular phylogenies, we show that cycads underwent a near synchronous global rediversification beginning in the late Miocene, followed by a slowdown toward the Recent. Although the cycad lineage is ancient, our timetrees indicate that living cycad species are not much older than ∼12 million years. These data reject the hypothesized role of dinosaurs in generating extant diversity and the designation of today's cycad species as living fossils.
英文关键词	calibration; Cretaceous; dinosaur; electromagnetic radiation; flowering; fossil record; gymnosperm; Jurassic; Miocene; morphology; phylogeny; article; Cenozoic; climate change; Cretaceous; Cycadophyta; dinosaur; endangered species; fossil; geographic distribution; Jurassic; living fossil; Mesozoic; Miocene; morphology; nonhuman; phylogeny; plant; Pliocene; priority journal; radiation; species diversity; species extinction; Cycadopsida; Dinosauria; Magnoliophyta
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244855
作者单位	Arnold Arboretum of Harvard University, 22 Divinity Avenue, Cambridge, MA 02138, United States; University of California Museum of Paleontology, 1101 Valley Life Sciences Building, University of California Berkeley, Berkeley, CA 94720-4780, United States; National Herbarium of New South Wales, Royal Botanic Garden Sydney, Mrs Macquaries Road, Sydney NSW 2000, Australia; Departamento de Ecologia, Universidade de São Paulo, São Paulo-SP, Brazil; Department of Wildland Resources, Utah State University, 5230 Old Main Hill, Logan, UT 84322-5230, United States; Cullman Program for Molecular Systematics, New York Botanical Garden, Bronx, NY 10458-5126, United States
推荐引用方式 GB/T 7714	Nagalingum N.S.,Marshall C.R.,Quental T.B.,et al. Recent synchronous radiation of a living fossil[J],2011,334(6057).
APA	Nagalingum N.S.,Marshall C.R.,Quental T.B.,Rai H.S.,Little D.P.,&Mathews S..(2011).Recent synchronous radiation of a living fossil.Science,334(6057).
MLA	Nagalingum N.S.,et al."Recent synchronous radiation of a living fossil".Science 334.6057(2011).