Escudo de Veraguas Island: Piacenzian, Panama
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Malacostraca
- Decapoda
- Diogenidae
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Petrochirus bouvieri
Rathbun 1918
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| see common names | |||||||
Geography
| Country: | Panama | State/province: | Bocas del Toro |
| Coordinates: | 9.1° North, 81.5° West (view map) | ||
| Paleocoordinates: | 9.0° North, 81.1° West | ||
| Basis of coordinate: | estimated from map |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Piacenzian | ||
| Age range of interval: | 3.6 - 2.58 m.y. ago |
Stratigraphy
| Formation: | Escudo de Veraguas | ||||
| Stratigraphy comments: Overlying Unit: Not exposed. Underlying Unit: Not exposed. Thickness: About 131 m. (LeBlanc 2021). |
Lithology and environment
| Primary lithology: | burrows,gray,blue siltstone |
| Secondary lithology: | burrows silty claystone |
| Lithology description: This location is in the upper part of the Escudo de Veraguas Formation. The upper part of the Escudo de Veraguas Formation (Section 10 of Coates (1999)) consists of about 8 m of blue-gray, clayey siltstone and silty claystone, sparsely shelly and intensely burrow-mottled. Thalassinoid-type burrows are common, as are echinoids. Two distinctive marker beds within this section consist of slightly more indurated burrow zones, suggesting minor disconformities or slower depositional rates. (LeBlanc 2021). | |
| Environment: | offshore |
| Geology comments: The formation as a whole represents offshore siliciclastic shelf sediments deposited at palaeobathymetries of 100-150 m. It is likely that it was muddy bathyal in latest Miocene; inner to middle neritic, carbonate shoal or reef in early to middle Pliocene; and carbonate influenced, muddy outer neritic in middle to latest Pliocene (Collins 1993; Todd and Collins., 2005; Collins et al., 1993; Coates et al., 2005; LeBlanc 2021). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 228700 | ||
| Authorizer: | J. Wolfe | Enterer: | A. Lynch |
| Created: | 2022-12-28 16:14:18 | Last modified: | 2022-12-28 16:14:18 |
| Access level: | the public | Released: | 2022-12-28 16:14:18 |
| Creative Commons license: | CC BY |
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] |