Rio Tuquesa: Serravallian - Tortonian, Panama
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Malacostraca
- Decapoda
- Portunidae
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Euphylax maculatus
Collins 2005
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| see common names | |||||||
Geography
| Country: | Panama | State/province: | Darien |
| Coordinates: | 8.5° North, 77.7° West (view map) | ||
| Paleocoordinates: | |||
| Basis of coordinate: | estimated from map |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Serravallian - Tortonian | 10 m.y. bin: | Cenozoic 5 - Cenozoic 6 |
| Key time interval: | Serravallian - Tortonian | ||
| Age range of interval: | 13.82 - 7.246 m.y. ago |
Stratigraphy
| Formation: | Tuira | ||||
| Stratigraphy comments: Overlying Unit: The upper contact of the Tuira Formation in the Chucunaque-Tuira Basin is apparently conformable and marked by an abrupt transition from sandstone to the more calcareous shelly facies of the Yaviza Formation. Underlying Unit: The Tapaliza Formation across the Chucunaque-Tuira Basin. The lower contact is not exposed but is apparently conformable. Thickness: The thickness of the Tuira Formation ranges from 500m in the northwest to about 1000m around Yaviza (LeBlanc 2021). |
Lithology and environment
| Primary lithology: | lithified siltstone |
| Secondary lithology: | sandstone |
| Lithology description: Clayey siltstone and bioclastic and lithic sandstone, rich in bivalves, especially Pecten. (Coates et al, 2004). | |
| Environment: | coastal indet. |
| Geology comments: This locality falls into the Tuquesa River Section analyzed by Gurocak-Orhun and Collins, 2017. It consists of middle neritic sediments (30-60 m), indicated by E. antillarum and 55% H. concentrica. (pg. 15, but also pg. 13, Figure 4). The formation's sediments as a whole, however, were deposited at inner neritic (0–30 m) to middle bathyal (500–1500 m) depths. (LeBlanc 2021). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 228715 | ||
| Authorizer: | J. Wolfe | Enterer: | A. Lynch |
| Created: | 2022-12-28 18:02:22 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2022-12-28 18:02:22 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 32674. | J. A. Todd and J. S. H. Collins. 2005. Neogene and Quaternary crabs (Crustacea, Decapoda) collected from Costa Rica and Panama by members of the Panama Paleontology Project. Bulletin of the Mizunami Fossil Museum 32:53-85 [A. Hendy/A. Hendy] |