Bajo de la Palangana (upper levels): Riochican, Argentina
collected by Simpson, Brandmayr 1931, 1934
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
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Chelonii indet.
Latreille 1800
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de Broin and de la Fuente 1993 | |||||||||
| synonym of Testudines | ||||||||||
| Chelidae or Meiolanidae (=Meiolaniformes) | ||||||||||
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Mammalia
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? Notostylops sp.
Ameghino 1897
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Simpson 1935 | |||||||||
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= Mammalia indet.
Linnaeus 1758
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Vera and Krause 2020 | |||||||||
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Mammalia
- Astrapotheria
- Trigonostylopidae
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? Postpithecus sp.
Ameghino 1901
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1 specimen | |||||||||
| AMNH 27888 (cast) | ||||||||||
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= Trigonostylops sp.
Ameghino 1897
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Vera and Krause 2020 | |||||||||
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Trigonostylops sp.
Ameghino 1897
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Simpson 1935 | |||||||||
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Mammalia
- Notoungulata
- Henricosborniidae
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Othnielmarshia sp.
Ameghino 1901
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Marshall et al. 1983 | |||||||||
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? Polystylops sp.
Ameghino 1904
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Simpson 1935 | |||||||||
| synonym of Henricosbornia | ||||||||||
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Henricosbornia ? lophodonta
Ameghino 1901
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Simpson 1935 | |||||||||
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= Henricosbornia lophodonta
Ameghino 1901
|
Vera and Krause 2020 | |||||||||
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Henricosbornia sp.
Ameghino 1901
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Simpson 1935 | |||||||||
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= Henricosbornia lophodonta
Ameghino 1901
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Vera and Krause 2020 | |||||||||
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Mammalia
- Notoungulata
- Archaeohyracidae
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? Eohyrax sp.
Ameghino 1901
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Marshall et al. 1983 | |||||||||
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Mammalia
- Notoungulata
- Oldfieldthomasiidae
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Notopithecus sp.
Ameghino 1897
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Simpson 1935 | |||||||||
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= Kibenikhoria get
Simpson 1935
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Vera and Krause 2020 | |||||||||
| MGP-PD 31363a–c, MGP-PD 31564, MGP-PD 31770, MGP-PD 31776, MGP-PD 32034, MLP 61-VIII-3-174 | ||||||||||
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Mammalia
- Notoungulata
- Isotemnidae
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? Pleurostylodon sp.
Ameghino 1897
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Marshall et al. 1983 | |||||||||
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Isotemnus sp.
Ameghino 1897
|
Simpson 1935 | |||||||||
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Isotemnus cf. primitivus
Ameghino 1897
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Simpson 1935 | |||||||||
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= Isotemnus cf. ctalego
Simpson 1935
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Vera and Krause 2020 | |||||||||
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Mammalia
- Notoungulata
- Archaeopithecidae
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Archaeopithecus rogeri
Ameghino 1897
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Vera 2017 | |||||||||
| MGP 29056, 31657, 31658, 31663, 31718-31720, 31727, 31729, 31753, 31759, 31763, 31767-31769 and 31777; MLP 34- V-22-7, MLP 61-VIII-3-145, 146, 148, 176 and 177 | ||||||||||
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Mammalia
- Notoungulata
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Brandmayria simpsoni
Cabrera 1935
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Simpson 1967 | 1 specimen | ||||||||
| MLP 34-V-22.3, upper premolar (type); referred but uncertain: MLP 34-V-22.5, lower premolar | ||||||||||
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Mammalia
- Panameriungulata
- Macraucheniidae
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Victorlemoineia sp.
Ameghino 1901
|
1 specimen | |||||||||
| AMNH 27895 (cast) | ||||||||||
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Mammalia
- Panameriungulata
- Proterotheriidae
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Ricardolydekkeria sp.
Ameghino 1901
|
1 specimen | |||||||||
| AMNH 27891 (cast); original is MGP-PD 29079 (see Vera et al., 2015, ref. 58073) | ||||||||||
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Josepholeidya sp.
Ameghino 1901
|
1 specimen | |||||||||
| synonym of Anisolambda | ||||||||||
| AMNH 27890 (cast) | ||||||||||
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Mammalia
- Panameriungulata
- Didolodontidae
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Ernestokokenia ? yirunhor
Simpson 1935
|
Simpson 1935 | |||||||||
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Ernestokokenia chaishoer n. sp.
Simpson 1935
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2 specimens | |||||||||
| AMNH 27892a (cast of holotype). AMNH 27892b (cast of paratype) | ||||||||||
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Mammalia
- Sparassodonta
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? Nemolestes sp.
Ameghino 1902
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Marshall et al. 1983 | |||||||||
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Mammalia
- Polydolopidae
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Polydolops winecage n. sp.
Simpson 1935
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1 specimen | |||||||||
| recombined as Pliodolops winecage | ||||||||||
| AMNH 27893 (cast of holotype) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 45.4° South, 67.2° West (view map) | ||
| Paleocoordinates: | 48.0° South, 56.9° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| Stage: | Thanetian | 10 m.y. bin: | Cenozoic 1 |
| *Period: | Early/Lower Tertiary | *Epoch: | Early/Lower Eocene | *Local age/stage: | Casamayoran |
| Key time interval: | Riochican | Mammal zone: | Riochican |
| Age range of interval: | 56.90000 - 56.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Río Chico | Formation: | Las Flores | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 85 to 88 meters above the "Banco Negro Superior" and about six meters below the Casamayor tuffs; Ernestokokenia Faunal Zone of Simpson (1935), and Riochican SALMA, which is argued to be late Early Eocene in age (Woodburne et al. 2014). Although this has been assigned to the Koluel Kaike Formation by some studies, Vera and Krause (2020) argue that this level in the locality belongs to the upper Las Flores Formation | |||||
Lithology and environment
| Primary lithology: | coarse,gray sandstone |
| Includes fossils? | Y |
| Lithology description: Coarse grey to pink sandstone | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | AMNH | ||
| Collectors: | Simpson, Brandmayr | Collection dates: | 1931, 1934 |
| Collection method comments: Original specimens are in the Feruglio Collection. Casts in AMNH | |||
Metadata
| Also known as: | Bajo Palangana; Ernestokokenia fauna | ||
| Database number: | 13781 | ||
| Authorizer: | J. Alroy, R. Butler, P. Mannion, E. Vlachos, J. Zijlstra | Enterer: | J. Wertheim, P. Mannion, R. Butler, J. Zijlstra, E. Vlachos |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-04-25 17:39:22 | Last modified: | 2022-10-07 16:17:52 |
| Access level: | the public | Released: | 2002-04-25 17:39:22 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 6147. | 5% 49100 | G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25 [J. Alroy/J. Wertheim/J. Wertheim] |
Secondary references:
| 42415 | F. de Broin and M. de la Fuente. 1993. Les tortues fossiles d'Argentine: synthese [The fossil turtles of Argentina: synthesis]. Annales de Paléontologie (Invertebrés-Vertebrés) 79(3):169-232 [R. Benson/R. Benson/M. Carrano] | |
| 57845 | L. G. Marshall, R. Hoffstetter, and R. Pascual. 1983. Mammals and stratigraphy: Geochronology of the continental mammal-bearing Tertiary of South America. Palaeovertebrata Mém. Extr:1-93 [J. Zijlstra/J. Zijlstra/J. Zijlstra] | |
| 57551 | G. G. Simpson. 1935. Occurrence and relationships of the Rio Chico fauna of Patagonia. American Museum Novitates 818:1-21 [R. Butler/R. Butler] | |
| 10312 | G. G. Simpson. 1967. The beginning of the age of mammals in South America. Part II. Bulletin of the American Museum of Natural History 137:1-260 [D. Croft/D. Croft/K. Pino] | |
| 63245 | B. Vera. 2017. Patagonian Eocene Archaeopithecidae Ameghino, 1897 (Notoungulata): systematic revision, phylogeny and biostratigraphy. Journal of Paleontology [P. Mannion/P. Mannion] | |
| 73732 | B. Vera and J. M. Krause. 2020. New insights into the Kibenikhoria and Ernestokokenia faunas and the implications for the early Eocene of Patagonia, Argentina. Journal of Vertebrate Paleontology e1772801:1-21 [P. Mannion/P. Mannion] | |
| 57561 | M. O. Woodburne, F. J. Goin, M. Bond, A. A. Carlini, J. N. Gelfo, G. M. López, A. Iglesias and A. N. Zimicz. 2014. Paleogene Land Mammal Faunas of South America; a Response to Global Climatic Changes and Indigenous Floral Diversity. Journal of Mammalian Evolution 21:1-73 [R. Butler/R. Butler] |