Upper Beds - west side of Scarritt Pocket: Deseadan, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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cf. Proadinotherium sp.
Ameghino 1894
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3 specimens | |||||||||
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= Nesodontinae indet.
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Marshall et al. 1986 | |||||||||
| AMNH 29621 | ||||||||||
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Mammalia
- Notoungulata
- Archaeohyracidae
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Archaeohyrax cf. propheticus
Ameghino 1897
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10 specimens | |||||||||
| possibly more than 10 specimens | ||||||||||
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= Archaeohyrax patagonicus
Ameghino 1897
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Marshall et al. 1986 | |||||||||
| AMNH 29609 | ||||||||||
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Mammalia
- Notoungulata
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Propachyrucos simpsoni
Chaffee 1952
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1 individual | |||||||||
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= Propachyrucos ameghinorum
Simpson 1945
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Marshall et al. 1986 | |||||||||
| AMNH 29604, 29608, 29620 | ||||||||||
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Prosotherium garzoni
Ameghino 1897
|
1 individual | |||||||||
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= Propachyrucos ameghinorum
Simpson 1945
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Marshall et al. 1986 | |||||||||
| AMNH 29608 | ||||||||||
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Mammalia
- Notoungulata
- Interatheriidae
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Plagiarthrus clivus
(Ameghino 1894)
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1 individual | |||||||||
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= Interatheriinae indet.
Simpson 1945
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Marshall et al. 1986 | |||||||||
| AMNH 29606 | ||||||||||
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Argyrohyrax proavunculus
Ameghino 1897
|
Marshall et al. 1986 | 1 specimen | ||||||||
| AMNH 29603 | ||||||||||
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Mammalia
- Notoungulata
- Notohippidae
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Trachytherus sp.
Ameghino 1889
|
1 individual | |||||||||
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= ? Rhynchippus equinus
Ameghino 1897
|
Marshall et al. 1986 | |||||||||
| AMNH 29622 | ||||||||||
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Rhynchippus cf. equinus
Ameghino 1897
|
1 individual | |||||||||
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= ? Rhynchippus equinus
Ameghino 1897
|
Marshall et al. 1986 | |||||||||
| AMNH 29618, 29622 | ||||||||||
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Mammalia
- Astrapotheria
- Astrapotheriidae
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cf. Parastrapotherium sp.
Ameghino 1895
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1 individual | |||||||||
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= Astrapotheriinae indet.
Soria and Alvarenga 1989
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Marshall et al. 1986 | |||||||||
| AMNH 29619 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 44.7° South, 68.4° West (view map) | ||
| Paleocoordinates: | 45.9° South, 61.0° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| 10 m.y. bin: | Cenozoic 4-5 |
| Key time interval: | Deseadan |
| Age range of interval: | 28.9 - 20.9 m.y. ago |
Stratigraphy
| Formation: | Sarmiento | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The lava flow, Beta, overlies the Crater Lake Beds, and it is overlain by a nodular tuff.
Eocene–Oligocene ‘Tobas del Sarmiento’, Sarmiento Group or Sarmiento Formation (Feruglio 1949; Andreis et al. 1975; Spalletti & Mazzoni 1977, 1979; Reguero & Escribano 1996). Regarding the age of Sarmiento formation, absolute dates are lacking for Cabeza Blanca, but Deseadan levels have been dated in other localities such as Salla, Bolivia (29.4–25.65 Ma), Moquegua, Peru (26.25 Ma), and Chubut, Argentina, Gran Barranca (29.4–24.2 Ma) and Scarritt Pocket (27.17 Ma) (Dunn et al. 2013 and references therein; Vucetich et al. 2014). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 49851 | ||
| Authorizer: | J. Alroy, J. Zijlstra | Enterer: | J. Wertheim, J. Zijlstra |
| Modifier: | M. Kouvari | Research group: | vertebrate |
| Created: | 2005-04-28 10:31:07 | Last modified: | 2020-09-19 08:50:56 |
| Access level: | the public | Released: | 2005-04-28 10:31:07 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13361. | R.G. Chaffee. 1952. The Deseadan vertebrate fauna of the Scarritt Pocket, Patagonia. Bulletin of the American Museum of Natural History 98:505-562 [J. Alroy/J. Wertheim/J. Wertheim] |
Secondary references:
| 13081 | L. G. Marshall, R. L. Cifelli, R. E. Drake and G. H. Curtis. 1986. Vertebrate paleontology, geology, and geochronology of the Tapera de López and Scarritt Pocket, Chubut Province, Argentina. Journal of Paleontology 60(4):920-951 [D. Croft/D. Croft/D. Croft] |