Quebrada Penitas [Penita Fm] (Pliocene of Costa Rica)

Where: Costa Rica (8.2° N, 83.0° W: paleocoordinates 8.1° N, 82.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Penita Formation (Charco Azul Group), Late/Upper Pliocene (3.6 - 2.6 Ma)

• LITHOSTRATIGRAPHY: From Charco Azul Formation (Olsson 1942), which unconformably underlies the Armurelles Fm (Pleistocene). AGE: Pliocene as it is overlain by very different Pleistocene fauna Age supported by other sources, including Collins and Coates (1999). Correlated to Jama and Canoa Formations of Ecuador. STRAIGRAPHIC POSITION: From basal part of formation, only a short distance above basement andesite.

• bed-level stratigraphic resolution

Environment/lithology: offshore; unlithified, tuffaceous shale

• ENVIRONMENT: Deposited in deeper waters, probably between 100 and 400 fathoms.
• SPECIFIC LITHOLOGY: Soft tuffaceous shale. LITHIFICATION: Unlithified, base on figured specimens and lithologic description.

Size class: macrofossils

Collected by Landau

Collection methods: surface (float), surface (in situ),

• COLLECTORS: B. Landau. REPOSITORIES: B. Landau collection.

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 136335: authorized by Austin Hendy, entered by Austin Hendy on 26.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: An authoratative publication, although somewhat antiquated. However, all occurrences include species-resolution assignments and subgeneric classification.
 Tonnoidea - Ranellidae
Monoplex vestitus Hinds 1844 triton shell
 Tonnoidea - Bursidae
Marsupina nana Broderip and Sowerby 1829 frog shell