Search Results - "Upchurch, G.R. Jr"
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Comparative Morphology of Fossil and Extant Leaves of Nelumbonaceae, Including a New Genus from the Late Cretaceous of Western North America
Published in Systematic botany (01-04-2011)“…We describe in detail the foliar architecture of extant Nelumbo and propose a new genus, Exnelumbites Estrada-Ruiz, Upchurch, Wolfe & Cevallos-Ferriz, for…”
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Evidence for the recovery of terrestrial ecosystems ahead of marine primary production following a biotic crisis at the Cretaceous-Tertiary boundary
Published in Journal of the Geological Society (01-09-2001)“…The fossil record demonstrates that mass extinction across the Cretaceous-Tertiary (K-T) boundary is more severe in the marine than the terrestrial realm. We…”
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Homocysteine, EDRF, and endothelial function
Published in The Journal of nutrition (01-04-1996)“…Nitric oxide, a heterodiatomic molecule, serves as an endothelium-dependent vasodilator and an antithrombotic agent in the vasculature. Because of its…”
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Vegetation, climatic and floral changes at the Cretaceous-Tertiary boundary
Published in Nature (London) (13-11-1986)“…The western interior of North America has the only known non-marine sections that contain the iridium-rich clay interpreted as the Cretaceous-Tertiary (K-T)…”
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Leaf assemblages across the Cretaceous-Tertiary boundary in the Raton Basin, New Mexico and Colorado
Published in Proceedings of the National Academy of Sciences - PNAS (01-08-1987)“…Analyses of leaf megafossil and dispersed leaf cuticle assemblages indicate that major ecologic disruption and high rates of extinction occurred in plant…”
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Cuticular anatomy of angiosperm leaves from the lower cretaceous potomac group. I. Zone I leaves
Published in American journal of botany (01-02-1984)“…Angiosperm leaf cuticles from the oldest part of the Potomac Group reinforce previous paleobotanical evidence for a Cretaceous flowering plant diversification…”
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Drewria potomacensis gen. et sp. nov., an early Cretaceous member of Gnetales from the Potomac Group of Virginia
Published in American journal of botany (01-11-1987)“…Drewria potomacensis gen. et sp. nov. from the Lower Cretaceous Potomac Group of Virginia (Zone I, probably Aptian) provides the first definite Mesozoic…”
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