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When are leaves good thermometers? A new case for Leaf Margin Analysis
Precise estimates of past temperatures are critical for understanding the evolution of organisms and the physical biosphere, and data from continental areas are an indispensable complement to theExpand
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Late Paleocene–early Eocene climate changes in southwestern Wyoming: Paleobotanical analysis
The warmest global temperatures of the Cenozoic Era occurred in early Eocene time, following a warming trend that started in late Paleocene time. The greater Green River Basin of southwestern WyomingExpand
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Carotenoid Modulation of Immune Function and Sexual Attractiveness in Zebra Finches
).All1215voucherspecimensforthisstudyarehousedatMEF, including exemplar specimens of each species.Fieldwork reported here took place inExpand
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Correlated terrestrial and marine evidence for global climate changes before mass extinction at the Cretaceous–Paleogene boundary
Terrestrial climates near the time of the end-Cretaceous mass extinction are poorly known, limiting understanding of environmentally driven changes in biodiversity that occurred before bolide impact.Expand
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High Plant Diversity in Eocene South America: Evidence from Patagonia
Tropical South America has the highest plant diversity of any region today, but this richness is usually characterized as a geologically recent development (Neogene or Pleistocene). From caldera-lakeExpand
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Eocene Plant Diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina
The origins of South America’s exceptional plant diversity are poorly known from the fossil record. We report on unbiased quantitative collections of fossil floras from Laguna del Hunco (LH) and RíoExpand
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Phylogenetic biome conservatism on a global scale
How and why organisms are distributed as they are has long intrigued evolutionary biologists. The tendency for species to retain their ancestral ecology has been demonstrated in distributions onExpand
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Testing the impact of calibration on molecular divergence times using a fossil-rich group: the case of Nothofagus (Fagales).
Although temporal calibration is widely recognized as critical for obtaining accurate divergence-time estimates using molecular dating methods, few studies have evaluated the variation resulting fromExpand
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Late Paleocene fossils from the Cerrejón Formation, Colombia, are the earliest record of Neotropical rainforest
Neotropical rainforests have a very poor fossil record, making hypotheses concerning their origins difficult to evaluate. Nevertheless, some of their most important characteristics can be preservedExpand
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A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
Few South American macrofloras of Paleocene age are known, and this limits our knowledge of diversity and composition between the end-Cretaceous event and the Eocene appearance of high floralExpand
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