Arroyo Napostá Grande (Miembro Arenoso Medio): Lujanian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cingulata
- Dasypodidae
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Chaetophractus villosus
Desmarest 1804
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Mammalia
- Mylodontidae
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Scelidotherium leptocephalum
Owen 1839
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Mammalia
- Camelidae
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Lamini indet.
Webb 1965
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Deschamps 2005 | |||||||||
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Lama sp.
Cuvier 1800
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= Lama guanicoe
Müller 1776
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Deschamps 2005 | |||||||||
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Mammalia
- Perissodactyla
- Equidae
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Equus sp.
Linnaeus 1758
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| Subgenus Amerihippus | ||||||||||
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= Equus neogaeus
Lund 1840
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Deschamps 2005 | |||||||||
| synonym of Equus caballus | ||||||||||
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Mammalia
- Panameriungulata
- Macraucheniidae
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Macrauchenia patachonica
Owen 1838
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| corrected as Macrauchenia patagonica | ||||||||||
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Reptilia
- Rheiformes
- Rheidae
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Rheidae indet.
Bonaparte 1849
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Deschamps 2005 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Buenos Aires |
| Coordinates: | 38.5° South, 62.1° West (view map) | ||
| Paleocoordinates: | 38.5° South, 62.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Lujanian | ||
| Age range of interval: | 0.30000 - 0.01170 m.y. ago |
Stratigraphy
| Stratigraphy comments: assigned to the "Agua Blanca Sequence"; proposed to be Lujanian SALMA in age |
Lithology and environment
| Primary lithology: | sandstone |
| Lithology description: sandstone | |
| Environment: | fluvial indet. |
| Geology comments: ostracods indicate a seasonally dry fluvial environment | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Disassociated major elements: | some |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Cátedra de Geología Histórica from the Universidad Nacional del Sur, Bahía Blanca | |
Metadata
| Database number: | 63337 | ||
| Authorizer: | J. Alroy, D. Croft | Enterer: | J. Alroy, D. Croft |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1999-02-09 20:53:26 | Last modified: | 2007-04-23 20:57:51 |
| Access level: | the public | Released: | 1999-02-09 20:53:26 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23893. | C. M. Deschamps and E. P. Tonni. 1992. Los vertebrados del Pleistoceno tardío del arroyo Napostá Grande, provincia de Buenos Aires. Aspectos paleoambientales. Ameghiniana 29(3):201-210 [J. Alroy/J. Alroy/J. Alroy] |
Secondary references:
| 17632 | C. M. Deschamps. 2005. Late Cenozoic mammal bio-chronostratigraphy in southwestern Buenos Aires Province, Argentina. Ameghiniana 42(4):733-750 [D. Croft/D. Croft] |