Bajada del Diablo: Colhuehuapian, Argentina
collected by Cheme-Arriaga et al. 2016
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Mammalia
- Panameriungulata
- Macraucheniidae
|
||||||||||
|
Pternoconius bondi n. sp.
Cheme-Arriaga et al. 2016
|
||||||||||
| Type specimen: MPEF-PV 2576, referred materials = MLP 61-IV-11-103 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 42.9° South, 67.5° West (view map) | ||
| Paleocoordinates: | 43.5° South, 61.7° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Colhuehuapian | ||
| Age range of interval: | 20.9 - 17.4 m.y. ago |
Stratigraphy
| Formation: | Sarmiento | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Cheme-Arriaga et al. 2016: Sarmiento Formation represents one of the most expressive units in terms of geologic events and fossil remains from the Paleogene of extra-Andean Patagonia.Sarmiento Formation crop out (Ardolino and Franchi, 1996; Lema et al., 2001). In Bajada del Diablo, southwest from the Telsen locality, the Somun Cura and Sar- miento formations interleave (Ardolino and Franchi, 1996). Tuffs of the Sarmiento Formation under- and overlie basalt mantles from the Somun Cura Formation. One basalt sample from this site gave an isotopic age of 27 Ma. They are also covered in the same locality by a basalt mantle, named Basalto La Mesada, with an age of about 17 to 16 Ma. The specimen here studied (MPEF-PV 2576) derives from a zone of white tuffs and fine sandstones, slightly stratified, belong- ing to the upper part of the Sarmiento Formation (Colhuehuapian SALMA, early Miocene), located a few meters above the basalt mantle corresponding to the Somun Cura Formation. | |||||
Lithology and environment
| Primary lithology: | fine lithified sandstone |
| Secondary lithology: | white lithified tuff |
| Includes fossils? | Y |
| Lithology description: A zone of white tuffs and fine sandstones, slightly stratified, belonging to the upper part of the Sarmiento Formation (Colhuehuapian SALMA, early Miocene), located a few meters above the basalt mantle corresponding to the Somun Cura Formation (late Oligocene). | |
| Environment: | wet floodplain |
| Geology comments: Ardolino and Franchi, 1996: the paleoenvironment was an open plains region, slightly undulating, with freshwater ponds and shallow riverbeds, with intermittent volcanic activity and removal, reworking, and resedimentation of older material. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Cheme-Arriaga et al. 2016 |
| Collection method comments: MPEF-PV 2576 is currently stored in Museo Paleontologico ‘Egidio Feruglio’, Trelew, Chubut, Argentina. | |
Metadata
| Database number: | 201746 | ||
| Authorizer: | P. Mannion | Enterer: | G. Varnham |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2019-05-25 04:24:58 | Last modified: | 2019-05-30 07:59:07 |
| Access level: | the public | Released: | 2019-05-25 04:24:58 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 69043. | L. Cheme-Arriaga, M. T. Dozo, and J. N. Gelfo. 2016. A new Cramaucheniinae (Litopterna, Macraucheniidae) from the early Miocene of Patagonia, Argentina. Journal of Vertebrate Paleontology 36(3):e1229672 [P. Mannion/G. Varnham] |