Pilcaniyeu road, near Rio Pichileufu: Lutetian, Argentina
collected by Piatnitzky
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Insecta
- Hymenoptera
- Formicidae
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Ameghinoia piatnitzkyi n. gen., n. sp.
Viana and Haedo Rossi 1957
|
3 specimens | |||||||||
| recombined as Archimyrmex piatnitzkii | ||||||||||
| (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Rio Negro |
| Coordinates: | 41.1° South, 70.8° West (view map) | ||
| Paleocoordinates: | 43.6° South, 61.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Lutetian | 10 m.y. bin: | Cenozoic 2 |
| Key time interval: | Lutetian | ||
| Age range of interval: | 47.80000 - 41.20000 m.y. ago |
Stratigraphy
| Formation: | Ventana | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Found near famous flora of Burdigalian age, so assumed to be Burdigalian (Middle Miocene) by Viana & Haedo Rossi, but more likely from the Ventana Formation of early Lutetian age. The locality was dated using 40Ar/39Ar analyses in Wilf et al. (2005) and recalculated in Wilf (2012), giving an age of 47.74 ± 0.05 Ma (million years ago). | |||||
Lithology and environment
| Primary lithology: | lithified mudstone | ||
| Environment: | crater lake | Tectonic setting: | volcanic basin |
| Geology comments: Volcanic caldera-lake beds | |||
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Piatnitzky |
| Collection method comments: Repository: Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" | |
Metadata
| Database number: | 138647 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | paleoentomology |
| Created: | 2013-01-23 13:53:15 | Last modified: | 2017-05-23 16:34:15 |
| Access level: | the public | Released: | 2013-01-23 13:53:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 44403. | M. J. Viana and J. A. Haedo Rossi. 1957. Primer hallazgo en el hemisferio sur de Formicidae extinguidos y catalogo mundial de los Formicidae fosiles. Ameghiniana 1:108-113 [M. Clapham/M. Clapham] |