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Recent Synchronous Radiation of a Living Fossil.

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Title: Recent Synchronous Radiation of a Living Fossil.
Authors: Nagalingum, N. S., Marshall, C. R., Quental, T. B., Rai, H. S., Little, D. P., Mathews, S.
Source: Science (pre-March 2025). 11/11/2011, Vol. 334 Issue 6057, p796-799. 4p.
Subjects: Cycads, Relict plants, Plant species diversity, Jurassic paleobotany, Cretaceous paleobotany, Plant phylogeny, Plant evolution
Abstract: 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 [ate 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 rote of dinosaurs in generating extant diversity and the designation of today's cycad species as living fossils. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Recent Synchronous Radiation of a Living Fossil.
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 11/11/2011, Vol. 334 Issue 6057, p796-799. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Cycads%22">Cycads</searchLink><br /><searchLink fieldCode="DE" term="%22Relict+plants%22">Relict plants</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+species+diversity%22">Plant species diversity</searchLink><br /><searchLink fieldCode="DE" term="%22Jurassic+paleobotany%22">Jurassic paleobotany</searchLink><br /><searchLink fieldCode="DE" term="%22Cretaceous+paleobotany%22">Cretaceous paleobotany</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+phylogeny%22">Plant phylogeny</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+evolution%22">Plant evolution</searchLink>
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  Data: 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 [ate 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 rote of dinosaurs in generating extant diversity and the designation of today's cycad species as living fossils. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=67661254
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        Value: 10.1126/science.1209926
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        Text: English
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      – SubjectFull: Cycads
        Type: general
      – SubjectFull: Relict plants
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      – SubjectFull: Plant species diversity
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      – SubjectFull: Jurassic paleobotany
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      – TitleFull: Recent Synchronous Radiation of a Living Fossil.
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              Text: 11/11/2011
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