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Eocene Plant Diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina
Diverse floral associations in Patagonia evolved by the Eocene, possibly in response to global warming, and were persistent and areally extensive, suggesting extraordinary richness at low latitudes via the latitudinal diversity gradient. Expand
High Plant Diversity in Eocene South America: Evidence from Patagonia
Radioisotopic and paleomagnetic analyses indicate that the flora was deposited 52 million years ago, the time of the early Eocene climatic optimum, when tropical plant taxa and warm, equable climates reached middle latitudes of both hemispheres. Expand
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
Oldest Known Eucalyptus Macrofossils Are from South America
These fossils indicate that the evolution of the eucalypt group is not constrained to a single region, and strengthen the taxonomic connections between the Laguna del Hunco paleoflora and extant subtropical and tropical Australasia. Expand
A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs
A new giant titanosaur is described, which represents the largest species described so far and one of the most complete titanosaurs, and its inclusion in an extended phylogenetic analysis and the optimization of body mass reveals the presence of an endemic clade of giant titanosaurs inhabited Patagonia between the Albian and the Santonian. Expand
New perspectives on the Mesozoic seed fern order Corystospermales based on attached organs from the Triassic of Antarctica.
Phylogenetic analysis suggests that the corystosperm cupule is an unlikely homologue for the angiosperm carpel or outer integument, and studies that treat Dicroidium leaf morphospecies as proxies for biological species of entire plants should be reconsidered. Expand
Richness of plant-insect associations in Eocene Patagonia: a legacy for South American biodiversity.
Significant more damage diversity is found at Laguna del Hunco than in the North American floras, whether measured on bulk collections or on individual plant species, for both damage morphotypes and feeding groups. Expand
In situ fossil forest from the upper Fremouw Formation (Triassic) of Antarctica: paleoenvironmental setting and paleoclimate analysis
Abstract A structural and ecological study of a standing Triassic forest containing 99 silicified trunks from the Fremouw Formation of Antarctica is detailed. Utilizing quantitative methods, forestExpand
Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests.
Combined evidence indicates a biome similar to extant subtropical, or tropical montane, rainforests that persisted for at least 4.4 Myr, linking elevated floral richness to abundant rainfall. Expand
Permian phytogeography in Gondwana
Abstract Phytogeographic patterns based on multivariate techniques (Multidimensional Scaling) are proposed for the Permian vegetation of Gondwana. This approach requires a data set with broadExpand