Eocene Plant Diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina

  title={Eocene Plant Diversity at Laguna del Hunco and R{\'i}o Pichileuf{\'u}, Patagonia, Argentina},
  author={Peter Wilf and Kirk R. Johnson and N{\'e}stor R C{\'u}neo and M. Elliot Smith and Brad S. Singer and Maria A. Gandolfo},
  journal={The American Naturalist},
  pages={634 - 650}
The origins of South America's exceptional plant diversity are poorly known from the fossil record. [...] Key Result At LH, from 4,303 identified specimens, we recognize 186 species of plant organs and 152 species of leaves. Adjusted for sample size, the LH flora is more diverse than comparable Eocene floras known from other continents. The RP flora shares several taxa with LH and appears to be as rich, although sampling is preliminary. The two floras were previously considered coeval.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.
Early Eocene Spore and Pollen Assemblages from the Laguna del Hunco Fossil Lake Beds, Patagonia, Argentina
The LH spore-pollen assemblages augment the plant fossil record for this significant Eocene locality by incorporating new taxa, and reinforce the presence of plant families previously reported from macrofossils, such as Juglandaceae, with pollen grains similar to those of the Engelhardia-Alfaroa group.
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.
Rainforest conifers of Eocene Patagonia: attached cones and foliage of the extant Southeast Asian and Australasian genus Dacrycarpus (Podocarpaceae).
  • P. Wilf
  • Biology, Medicine
    American journal of botany
  • 2012
Dacrycarpus puertae provides the first significant Asian link for Eocene Patagonian floras, strengthens the biogeographic connections from Patagonia to Australasia across Antarctica during the warm Eocene, and indicates high-rainfall paleoenvironments.
Resolving Australian analogs for an Eocene Patagonian paleorainforest using leaf size and floristics.
The legacy of LH is evident not only in subtropical and tropical Australia but also in tropical montane Australasia and Southeast Asia, reflecting the disparate histories of surviving Gondwanan lineages.
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 floral
First South American Agathis (Araucariaceae), Eocene of Patagonia.
PREMISE OF THE STUDY Agathis is an iconic genus of large, ecologically important, and economically valuable conifers that range over lowland to upper montane rainforests from New Zealand to Sumatra.
Araucariaceae macrofossil record from South America and Antarctica
Araucariaceae fossils are abundant in Patagonia and on Seymour (Marambio) and King George (25 de Mayo) islands, Antarctica. Araucariacean macrofossil suites are represented by records of 121 woods,
Angiosperm association from the Río Turbio Formation (Eocene–?Oligocene) Santa Cruz, Argentina: revision of Hünicken’s (1955) fossil leaves collection
Vento, B. & Prámparo, M. B., January 2018. Angiosperm association from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz, Argentina: Revision of Hünicken’s (1955) fossil leaves collection,
Casuarinaceae from the Eocene of Patagonia, Argentina
The diverse Gymnostoma described here further strengthens biogeographic links between Paleogene floras of Patagonia and Australasia and the view that the family was diverse and had widespread distribution during the early Eocene climatic optimum.


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.
The Monimiaceae and a New Laurelia
The family Monimiaceae does not reach the North Temperate zone, consequently it is unfamiliar to students of fossil floras who have largely lived in that zone, and it seems likely that it may be represented in the Eocene floras of southeastern North America.
From the interpretation of distribution and characters of the present flora arise the following conclusions: The relation of cool-temperate flora of Argentina with other zones geographically
Microfloral diversity patterns of the late Paleocene–Eocene interval in Colombia, northern South America
The late Paleocene–early Eocene interval was characterized by a long period of global warming that culminated with the highest temperatures of the Tertiary. This interval was also associated with
South American palaeobotany and the origins of neotropical rainforests.
  • R. Burnham, Kirk R. Johnson
  • Medicine, Biology
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 2004
It is indicated that evidence of neotropical rainforest is exceedingly rare and equivocal before the Palaeocene, and a mismatch of evidence regarding the age of origin between sites of palaeobotanical high diversity and sites of predicted tropical climates should be reconciled with intensified collecting efforts in South America.
Endemism centres, refugia and botanical collection density in Brazilian Amazonia
HERBARIUM specimen collecting in the Brazilian Amazon has been concentrated in widely scattered collecting centres associated with some proposed centres of substrate-independent endemism1–3,
Evidence for an in situ early Paleocene rainforest from Castle Rock, Colorado
A very diverse, early Paleocene (63.8 ± 0.3 Ma) fossil leaf site located in Castle Rock, Colorado represents nearly autochthonous burial of a rainforest floor. This is an unusual fossil flora
Paleogene phytogeography and climatology of South America
The purpose of the present work is to review the Paleogene taphofloras of South America and to analyze their paleophytogeographical and paleoclimatical significance, and to agree on the terminology used in biogeographical discussions, especially among paleobotanists.
Neogene and Quaternary history of vegetation, climate, and plant diversity in Amazonia ☆
The neotropical Amazonian and Andean plant diversity developed mainly during the Tertiary. In Amazonia, Miocene #oral diversity seems considerably higher than today. During the Neogene, tropical taxa
The Southern Conifer Family Araucariaceae: History, Status, and Value for Paleoenvironmental Reconstruction
Recent information on ecology and phylogeny and on pollen and macrofossil assemblages is examined to assess the history and present-day status of the Araucariaceae and its potential for refinement of past environmental, particularly climatic, conditions.