Escudo de Veraguas Island: Piacenzian, Panama

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Panopeidae
Malacostraca - Decapoda - Xanthidae
Heteractaea lunata (Milne Edwards and Lucas 1843)
see common names

Geography
Country:Panama State/province:Bocas del Toro
Coordinates: 9.1° North, 81.6° West (view map)
Paleocoordinates:9.4° North, 80.8° West (Wright 2013)
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 siltstone
Secondary lithology:burrows silty claystone
Lithology description: This location is in the lower part of the Escudo de Veraguas Formation. The lowest 10 m of the formation at the stratotype is moderately indurated, fine, silty sandstone and clayey siltstone, pervasively bioturbated and containing frequent, cemented, irregular burrow-concretions and horizons with dense thalassinoid burrow systems. The overlying 30 m of clayey siltstone, silty claystone and silty, fine sandstone is also pervasively bioturbated, with frequent concretions, thalassinoid burrows and scattered mollusks with a distinctive basal 2 m thick marker bed rich in corals and mollusks. Following 70 m of no exposure, the section continues with 13 m of clayey bioclastic siltstone, with some angular basalt grains, scattered mollusks and cupuladrian bryozoans. The section is massive and pervasively bioturbated with scattered fine shell hash. About 5 m from the top, a second marker horizon is defined by a densely packed coral biostrome that is also rich in echinoids and mollusks. (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:228706
Authorizer:J. Wolfe Enterer:A. Lynch
Created:2022-12-28 16:45:48 Last modified:2025-02-22 15:12:02
Access level:the public Released:2022-12-28 16:45:48
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]