Laguna del Hunco: quarry LH2: 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
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Polypodiopsida
- Osmundaceae
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Filicopsida informal TY001 leaf
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1 specimen | |||||||||
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= Todea amissa
Carvalho et al. 2013
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Carvalho et al. 2013 | |||||||||
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Pteridopsida
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Filicopsida informal TY003 leaf
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2 specimens | |||||||||
| synonym of Pteridopsida | ||||||||||
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Angiospermae
- Laurales
- Monimiaceae
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Magnoliopsida informal TY027 leaf
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1 specimen | |||||||||
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= Monimiophyllum callidentatum
Knight and Wilf 2013
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Knight and Wilf 2013 | |||||||||
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Angiospermae
- Laurales
- Lauraceae
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Lauraceae informal TY084 leaf
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40 specimens | |||||||||
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Angiospermae
- Proteales
- Proteaceae
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Lomatia occidentalis leaf
Frenguelli 1943
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9 specimens | |||||||||
| (Berry) Frenguelli | ||||||||||
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Angiospermae
- Fabales
- Fabaceae
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Fabaceae informal TY091 seed/fruit
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2 specimens | |||||||||
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Angiospermae
- Fagales
- Casuarinaceae
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Gymnostoma informal TY051 seed/fruit
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1 specimen | |||||||||
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= Gymnostoma spp. seed/fruit
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Zamaloa et al. 2006 | |||||||||
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Angiospermae
- Fagales
- Fagaceae
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Magnoliopsida informal "Tetracera" patagonica leaf
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44 specimens | |||||||||
| Berry | ||||||||||
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= Castaneophyllum patagonicum
Wilf et al. 2019
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Wilf et al. 2019 | |||||||||
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Angiospermae
- Malpighiales
- Euphorbiaceae
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Macaranga kirkjohnsonii
Wilf et al. 2023
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Wilf et al. 2023 | 2 specimens | ||||||||
| MPEF‐Pb 7990a,b and 7991a,b | ||||||||||
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Angiospermae
- Malvales
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Malvales informal cf. Sterculiaceae TY023 leaf
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13 specimens | |||||||||
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Angiospermae
- Brassicales
- Akaniaceae
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Akania patagonica leaf
Gandolfo et al. 1988
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3 specimens | |||||||||
| Gandolfo, Dibbern and Romero | ||||||||||
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Angiospermae
- Myrtales
- Myrtaceae
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Myrtaceae informal "Myrcia" deltoidea leaf
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7 specimens | |||||||||
| Engelhardt | ||||||||||
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Myrtaceae informal TY157 leaf
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1 specimen | |||||||||
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"Myrcia" chubutensis leaf
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21 specimens | |||||||||
| Berry | ||||||||||
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= Eucalyptus frenguelliana leaf
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Hermsen et al. 2012 | |||||||||
| Gandolfo and Zamaloa | ||||||||||
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Angiospermae
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Monocotyledonae informal TY130 leaf
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2 specimens | |||||||||
| spelled with current rank as Monocotyledoneae | ||||||||||
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Magnoliopsida
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Magnoliopsida informal ? Fabaceae TY017 leaf
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3 specimens | |||||||||
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Magnoliopsida informal "Schmidelia" proedulis leaf
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66 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal "Celtis" ameghenoi leaf
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141 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal TY022 leaf
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9 specimens | |||||||||
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Magnoliopsida informal "Rhamnidium" leaf
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6 specimens | |||||||||
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Magnoliopsida informal TY028 leaf
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4 specimens | |||||||||
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Magnoliopsida informal TY030 leaf
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3 specimens | |||||||||
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Magnoliopsida informal "Banara" prehernandiensis leaf
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4 specimens | |||||||||
| as figured by Berry (1938) | ||||||||||
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Magnoliopsida informal TY036 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY037 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY038 leaf
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13 specimens | |||||||||
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Magnoliopsida informal ?Escallonia TY043 leaf
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10 specimens | |||||||||
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Magnoliopsida informal TY045 leaf
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3 specimens | |||||||||
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Magnoliopsida informal cf. Macaranga or Mallotus leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY049 fertile axis
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1 specimen | |||||||||
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Magnoliopsida informal TY050 leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY054 leaf
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3 specimens | |||||||||
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Magnoliopsida informal TY056 leaf
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17 specimens | |||||||||
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Magnoliopsida informal "Myrica" mira leaf
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4 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal TY067 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY070 leaf
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2 specimens | |||||||||
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Magnoliopsida informal "Sterculia" patagonica leaf
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1 specimen | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal ?Myrtaceae TY075 leaf
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3 specimens | |||||||||
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Magnoliopsida informal TY076 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY077 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY078 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY083 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY085 fertile axis
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1 specimen | |||||||||
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Magnoliopsida informal TY093 seed/fruit
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3 specimens | |||||||||
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Magnoliopsida informal TY100 seed/fruit
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10 specimens | |||||||||
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Magnoliopsida informal TY102 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY103 leaf
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1 specimen | |||||||||
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Magnoliopsida informal "Cupania" grosseserrata leaf
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7 specimens | |||||||||
| (Engelhardt) Berry | ||||||||||
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Magnoliopsida informal "Coprosma" incerta leaf
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7 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal TY108 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY111 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY113 leaf
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5 specimens | |||||||||
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Magnoliopsida informal "Cupania" latifolioides leaf
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11 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal "Cassia" argentinensis leaf
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98 specimens | |||||||||
| Berry | ||||||||||
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Magnoliopsida informal TY122 leaf
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3 specimens | |||||||||
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Magnoliopsida informal TY126 leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY135 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY136 leaf
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1 specimen | |||||||||
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Magnoliopsida informal ?Melastomataceae TY138 leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY153 leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY159 leaf
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2 specimens | |||||||||
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Magnoliopsida informal TY167 leaf
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2 specimens | |||||||||
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Magnoliopsida informal ? Lauraceae TY190 leaf
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6 specimens | |||||||||
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Magnoliopsida informal TY191 leaf
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3 specimens | |||||||||
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Magnoliopsida informal TY192 leaf
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5 specimens | |||||||||
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Magnoliopsida informal ?Menispermaceae TY193 leaf
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1 specimen | |||||||||
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Magnoliopsida informal cf. Sterculiaceae TY194 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY195 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY196 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY197 leaf
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1 specimen | |||||||||
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Magnoliopsida informal TY198 leaf
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1 specimen | |||||||||
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Coniferales
- Cupressaceae
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"Libocedrus" prechilensis leaf
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2 specimens | |||||||||
| Berry | ||||||||||
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= Papuacedrus prechilensis leaf
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Wilf et al. 2009 | |||||||||
| (Berry) Wilf et al. | ||||||||||
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Coniferales
- Podocarpaceae
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Podocarpaceae informal TY121 leaf
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4 specimens | |||||||||
| (small planated leaves) | ||||||||||
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= Dacrycarpus puertae leaf
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Wilf 2012 | |||||||||
| Wilf 2012 | ||||||||||
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Podocarpus andiniformis leaf
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4 specimens | |||||||||
| Berry | ||||||||||
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Equisetopsida
- Araucariaceae
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"Zamia" tertiaria leaf
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2 specimens | |||||||||
| Engelhardt | ||||||||||
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= Agathis zamunerae
Wilf et al. 2014
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Wilf et al. 2014 | |||||||||
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Araucaria informal TY013 seed/fruit
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3 specimens | |||||||||
| (seed and cone scale) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 42.5° South, 70.0° West (view map) | ||
| Paleocoordinates: | 45.0° South, 60.0° West | ||
| 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: | 56.00000 - 47.80000 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: | LH2 | ||
| Database number: | 133043 | ||
| Authorizer: | P. Wilf, E. Vlachos | Enterer: | M. Donovan, E. Stiles, F. Aspromonte |
| Modifier: | E. Stiles | Research group: | paleobotany |
| Created: | 2012-09-01 01:02:16 | Last modified: | 2018-11-02 09:16:15 |
| Access level: | the public | Released: | 2012-09-01 01:02:16 |
| Creative Commons license: | CC BY | ||
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] | |
| 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] | |
| 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] | |
| 87948 | P. Wilf, A. Iglesias, and M. A. Gandolfo. 2023. The first Gondwanan Euphorbiaceae fossils reset the biogeographic history of the Macaranga‐Mallotus clade. American Journal of Botany 110(5):1-20 [E. Vlachos/F. Aspromonte] | |
| 43000 | P. Wilf, S. A. Little, A. Iglesias, M. C. Zamaloa, M. A. Gandolfo, N. R. Cúneo, and K. R. Johnson. 2009. Papuacedrus (Cupressaceae) in Eocene Patagonia, a new fossil link to Australasian rainforests. American Journal of Botany 96:2031-2047 [P. Wilf/M. Donovan] | |
| 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] |