Coquina (=Urumaco) (Miocene of Venezuela)

Where: Falcon, Venezuela (11.2° N, 70.3° W: paleocoordinates 10.7° N, 67.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: lower Member (Urumaco Formation), Middle Miocene (16.0 - 11.6 Ma)

• was L. Miocene (collection did not have formation or member) but from the paper it turns out it's the Urumaco formation, lower member

Environment/lithology: lagoonal; lithified mudstone and lithified shale

• The area was a coastal wetland with some lagoons of shallow waters, separated from the coast by sandy barriers.
• The lower member of Urumaco Formation is dominated by mudstones and is not as well exposed as the others two members. It is composed of dark-gray laminated mudstones and shales, and heterolothic intervals of lenticular to ripple cross-laminated, very fine grained sandstones, with syneresis cracks and Planolites, grading to coarsening-upward sequences of medium-bedded, hummocky, and ripple cross-stratitfied, fine-grained sandstones (Qurioz and Jaramillo, 2010).

Size class: macrofossils

• Two upper right molars of medium size, one partial M3? (AMU-CURS-181) and an almost complete M3 (AMU-uncataloged)

Preservation: original phosphate

Collection methods: Alcaldia de Urumaco, Venezuela, Coleccion Urumaco Rodolfo Sanchez (AMU-CURS)

Primary reference: I. Horovitz, M. R. Sanchez-Villagra, M. G. Vucetich and O. A. Aguilera. 2010. Fossil rodents from the late Miocene Urumaco and middle Miocene Cumaca formations, Venezuela. In M. R. Sanchez-Villagra, O. A. Aguilera, A. A. Carlini (eds.), Urumaco and Venezuelan Paleontology: The Fossil Record of the Northern Neotropics 214-232 [C. Jaramillo/A. Cardenas ]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152543: authorized by Carlos Jaramillo, entered by Andrés Cárdenas on 24.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Rodentia - Dinomyidae
cf. Potamarchus indet.
cf. Potamarchus indet. Burmeister 1885 caviomorph