Sand Dollar Hill [lower Gatun Fm] (Miocene of Panama)

Where: Panama (9.4° N, 79.8° W: paleocoordinates 9.1° N, 78.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: lower Gatun Member (Gatun Formation), Tortonian (11.6 - 7.2 Ma)

• STRATIGRAPHIC RELATIONS: From the Gatun Fm, which regionally overlies the Caimito Fm or Mesozoic basement. AGE: Serravalian, on the basis of revised chronostratigraphy (Hendy, unpublished data). STRATIGRAPHIC POSITION: From lower member of the Gatun Formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, shelly/skeletal siltstone

• ENVIRONMENT: Shallow-marine, siliciclastic environment.
• SPECIFIC LITHOLOGY: Siltstone. LITHIFICATION: Poorly-lithified, based on observations of material.

Size class: macrofossils

Preservation: original aragonite

Collected by Gale & Todd; reposited in the BMNH

Collection methods: surface (in situ),


Primary reference: A. G. Beu. 2010. Neogene Tonnoidean Gastropods of Tropical and South America; contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus. Bulletins of American Paleontology (377-378)1-550 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136303: authorized by Austin Hendy, entered by Austin Hendy on 25.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to taxa described in text, and subsequent publications. NOMENCLATURE: Authoritative publication with modern nomenclature and species-resolution identifications.
 Decapoda - Callianassidae
Neocallichirus scotti Brown and Pilsbry 1913 decapod
Callianassa sp. Leach 1814 decapod
 Decapoda - Hepatidae
Hepatus lineatus Rathbun 1898 crab
 Decapoda - Portunidae
Portunidae indet. Rafinesque 1815 swimming crab
 Tonnoidea - Ranellidae
Monoplex krebsii Mörch 1877 triton shell