Laguna del Hunco: quarry LH22: Ypresian, Argentina
collected by P. Wilf, N.R. Cuneo, K.R. Johnson, P. Puerta, M. A. Gandolfo 1999, 2002, 2004

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polypodiopsida - Osmundaceae
1 specimen
Carvalho et al. 2013
Equisetopsida - Araucariaceae
1 specimen
Berry
2 specimens
seed and cone scale
3 specimens
Engelhardt
Wilf et al. 2014
unclassified
1 specimen
Magnoliopsida
1 specimen
6 specimens
Berry
1 specimen
Berry
2 specimens
unclassified
2 specimens
Knight and Wilf 2013
Magnoliopsida
1 specimen
1 specimen
as figured in Berry 1925
1 specimen
9 specimens
Berry
1 specimen
1 specimen
Berry
1 specimen
3 specimens
Berry
1 specimen
Berry
1 specimen
(Berry) Berry
1 specimen
1 specimen
Angiospermae - Myrtales - Myrtaceae
1 specimen
Engelhardt
12 specimens
Berry
Hermsen et al. 2012
Gandolfo and Zamaloa
Angiospermae - Malvales
3 specimens
Angiospermae - Fagales - Fagaceae
1 specimen
Berry
Wilf et al. 2019
Angiospermae - Fagales - Casuarinaceae
1 specimen
    = Gymnostoma spp. seed/fruit
Zamaloa et al. 2006
3 specimens
    = Gymnostoma sp. leaf Johnson 1980
Zamaloa et al. 2006
Angiospermae - Laurales - Lauraceae
2 specimens
Coniferales - Podocarpaceae
1 specimen
Wilf et al. 2017
3 specimens
planated foliage
Wilf 2012
unclassified
4 specimens
Berry 1935
Villar de Seoane et al. 2015
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 42.5° South, 70.0° West (view map)
Paleocoordinates:43.9° South, 59.5° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Eocene
Stage: Ypresian 10 m.y. bin: Cenozoic 2
Key time interval: Ypresian
Age range of interval: 56 - 48.07 m.y. ago
Age estimate: 52.22 ± 0.22 Ma (Ar/Ar)
Stratigraphy
Formation:Huitrera
Stratigraphic resolution:bed
Stratigraphy comments: See P. Wilf et al. 2003, Science suppl., for detailed lithostratigraphy, paleomagnetic stratigraphy, and first Ar-Ar ages. See P. Wilf et al. 2012 (American Journal of Botany) for the revised Ar-Ar age given above.
Lithology and environment
Primary lithology:fine,tuffaceous,gray lithified silty,sandy "siliciclastic"
Includes fossils?Y
Lithology description: See Wilf et al. 2003, Science suppl., for complete lithologic summary.
Environment:crater lake Tectonic setting:volcanic basin
Geology comments: Large caldera-lake, embedded in the Eocene middle Chubut River volcanic pyroclastic complex. See E. Aragon and M.M. Mazzon, Rev. Asoc. Geol. Argent. 52(3):243-256 (1997).
Taphonomy
Modes of preservation:adpression,original silica,original carbon,replaced with silica
Size of fossils:macrofossils,mesofossils,microfossils
Spatial orientation:random
Preservation of anatomical detail:very poor
Abundance in sediment:abundant
Size sorting:medium
Fragmentation:frequent
Bioerosion:none
Feeding/predation traces:punctures,external foliage feeding,arthropod mining,arthropod galling,arthropod boring,piercing/sucking,oviposition
Temporal resolution:time-averaged
Spatial resolution:allochthonous
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Collection methods:bulk,selective quarrying,mechanical,field collection
Reason for describing collection:paleoecologic analysis
Museum repositories:MEF
Collectors:P. Wilf, N.R. Cuneo, K.R. Johnson, P. Puerta, M. A. Gandolfo Collection dates:1999, 2002, 2004
Metadata
Also known as:LH22
Database number:133063
Authorizer:P. Wilf Enterer:M. Donovan, E. Stiles
Modifier:E. Stiles Research group:paleobotany
Created:2012-09-01 01:53:19 Last modified:2025-02-22 15:12:02
Access level:the public Released:2012-09-01 01:53:19
Creative Commons license:CC0
Reference information

Primary reference:
42725. P. Wilf, K. R. Johnson, N. R. Cúneo, M. E. Smith, B. S. Singer and M. A. Gandolfo. 2005. Eocene Plant Diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina. The American Naturalist 165(6):634-650 [P. Wilf/M. Donovan]

Secondary references:

55786 M. R. Carvalho, P. Wilf, E. J. Hermsen, M. A. Gandolfo, N. R. Cúneo and K. R. Johnson. 2013. First record of Todea (Osmundaceae) in South America, from the early Eocene paleorainforests of Laguna del Hunco (Patagonia, Argentina). American Journal of Botany 100:1831-1848 [C. Jaramillo/C. Jaramillo]
43002 E. J. Hermsen, M. A. Gandolfo, and M. C. Zamaloa. 2012. The fossil record of Eucalyptus in Patagonia. American Journal of Botany 99:1356-1374 [P. Wilf/M. Donovan]
56100 C. Knight and P. Wilf. 2013. Rare leaf fossils of Monimiaceae and Atherospermataceae (Laurales) from Eocene Patagonian rainforests and their biogeographic significance. Palaeontologia Electronica 16(3):26A-39 p. [C. Jaramillo/C. Jaramillo]
66453 L. Villar de Seoane, N. R. Cuneo, I. E. Escapa, P. Wilf, and M. A. Gandolfo. 2015. Ginkgoites patagonicus (Berry) comb. nov. from the Eocene of Patagonia, last ginkgoalean record in South America. International Journal of Plant Sciences 176(4):346-363 [P. Wilf/E. Stiles/E. Stiles]
43004 P. Wilf. 2012. Rainforest conifers of Eocene Patagonia: attached cones and foliage of the extant southeast-Asian and Australasian genus Dacrycarpus (Podocarpaceae). American Journal of Botany 99:562-584 [P. Wilf/M. Donovan]
66216 P. Wilf, M. P. Donovan, N. R. Cuneo and M. A. Gandolfo. 2017. The fossil flip-leaves (Retrophyllum, Podocarpaceae) of southern South America. American Journal of Botany 104(9):1-26 [P. Wilf/E. Stiles]
55856 P. Wilf, I. H. Escapa, N. R. Cúneo, R. M. Kooyman, K. R. Johnson and A. Iglesias. 2014. First South American Agathis (Araucariaceae), Eocene of Patagonia. American Journal of Botany 101(1):156-179 [C. Jaramillo/C. Jaramillo]
69525 P. Wilf, K. C. Nixon, M. A. Gandolfo and N. R. Cúneo. 2019. Eocene Fagaceae from Patagonia and Gondwanan legacy in Asian rainforests. Science 364(6444):eaaw5139 [P. Wilf/E. Stiles]
43003 M. C. Zamaloa, M. A. Gandolfo, C. C. González, E. J. Romero, N. R. Cúneo and P. Wilf. 2006. Casuarinaceae from the Eocene of Patagonia, Argentina. International Journal of Plant Sciences 167:1279-1289 [P. Wilf/M. Donovan]