RHM Locality 4: Tortonian, Ecuador
collected by Duke University and Escuela Politécnica Nacional 1987
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cingulata
- Dasypodidae
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| MEPN 4363, 4361 | ||||||||||
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Mammalia
- Panameriungulata
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Litopterna indet.
Ameghino 1889
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| AAC and RHM, personal observation | ||||||||||
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Mammalia
- Rodentia
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Caviomorpha indet.
(Wood and Patterson 1955)
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| AAC and RHM, personal observation | ||||||||||
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Mammalia
- Notoungulata
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Toxodontia indet.
Ameghino 1887
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| AAC and RHM, personal observation | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Ecuador | State/province: | Azuay |
| Coordinates: | 3.3° South, 79.1° West (view map) | ||
| Paleocoordinates: | 2.7° South, 76.6° West (Wright 2013) | ||
| Basis of coordinate: | stated in text | ||
| Altitude: | 2930 meters | ||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Tortonian | ||
| Age range of interval: | 11.63 - 7.246 m.y. ago | ||
| Age estimate: | 9.0 ± 1.4 Ma (fission track) |
Stratigraphy
| Formation: | Letrero | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Combined zircon fission-track (ZFT) and paleomagnetic data suggest that the Letrero formation formed in a relatively short time period in the late Miocene, and specifically ZFT yielded 9.0 ± 1.4 Ma (Hungerbühler et al. 1995). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Lithology description: The Letrero Formation is composed of lacustrine sediments with strong fluvial clastic input and contains siltstones and fine-grained sandstones | |
| Environment: | lacustrine deltaic indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | Duke University and Escuela Politécnica Nacional | Collection dates: | 1987 |
| Collection method comments: MEPN, Museo de Historia Natural "Gustavo Orcés", Escuela Politécnica Nacional, Quito, Ecuador | |||
Metadata
| Database number: | 166501 | ||
| Authorizer: | C. Jaramillo | Enterer: | J. Carrillo |
| Modifier: | M. Kouvari | Research group: | vertebrate |
| Created: | 2015-02-16 10:07:13 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2015-02-16 10:07:13 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 54373. | A. A. Carlini, M. C. Castro, R.H. Madden and G.J. Scillato-Yané. 2014. A new species of Dasypodidae (Xenarthra: Cingulata) from the late Mioceneof northwestern South America: implications in the Dasypodini phylogeny and diversity. Historical Biology 26(6):728-736 [C. Jaramillo/J. Carrillo] |