Puesto Namur: Langhian, Argentina
collected by Guillermo Aguirrezabala
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Astrapotheria
- Astrapotheriidae
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Astrapotherium guillei n. sp.
Kramarz et al. 2019
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| Holotype, MAPBAR 5322, distorted skull | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Rio Negro |
| Coordinates: | 40.8° South, 70.2° West (view map) | ||
| Paleocoordinates: | 41.4° South, 65.8° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Langhian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Langhian | ||
| Age range of interval: | 15.98 - 13.82 m.y. ago |
Stratigraphy
| Formation: | Collón Cura | Member: | Las Bayas | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Kramarz et al. 2019: In this area, the Collón Cura Formation lays above the La Pava Formation separated by an angular unconformity, both filling part of a paleovalley excavated on igneous rocks of the Mamil Choique Formation (Permian). In this site, the exposed section of the Collón Cura Formation is 57 m thick. The fossil-bearing horizon is formed by slightly edaphized whitish-greyish tuffites lo- cated 8 m above the base of the exposed section. Based upon the lithological attributes, this sequence is referable to the Las Bayas Member, whereas the Pilcaniyeu Ignimbrite Member is missing in this area. In summary, the available stratigraphic and radiometric information supports an early middle Miocene (Langhian) for the deposits of the Collón Cura Formation exposed along the Comallo Valley. | |||||
Lithology and environment
| Primary lithology: | gray,white tuff |
| Lithology description: Kramarz et al. 2019: The fossil-bearing horizon is formed by slightly edaphized whitish-greyish tuffites located 8 m above the base of the exposed section. | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Guillermo Aguirrezabala |
| Collection method comments: Kramarz et al. 2019: MAPBAR 5322 housed at Museo de la Asociación Paleontológica Bariloche, San Carlos de Bariloche, Argentina | |
Metadata
| Also known as: | 20 km North of Comallo | ||
| Database number: | 211561 | ||
| Authorizer: | P. Mannion | Enterer: | G. Varnham |
| Modifier: | M. Kouvari | Research group: | vertebrate |
| Created: | 2020-07-21 06:01:35 | Last modified: | 2020-09-20 08:07:44 |
| Access level: | the public | Released: | 2020-07-21 06:01:35 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 73114. | A. Kramarz, A. Garrido, and M. Bond. 2019. Astrapotherium from the Middle Miocene Collón Cura Formation and the Decline of Astrapotheres in Southern South America. Ameghiniana 56(4):290-306 [P. Mannion/G. Varnham] |