Also known as IGM-2779

Where: Coahuila, Mexico (26.0° N, 101.0° W: paleocoordinates 31.7° N, 82.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Rancho Nuevo Formation (Difunta Group), Early/Lower Paleocene (66.0 - 61.7 Ma)

• Fossils obtained from the Rancho Nuevo Formation suggest an early Tertiary (Midway Fm-equivalent) age, equivalent to Kincaid-lower Wells Point, Clayton-lower Porters Creek, and lower Velasco units on the Gulf coastal plain.

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; lithified, concretionary, gray, green, sandy siltstone

Size class: macrofossils

Collection methods: quarrying,

• Studied material is deposited in the Museo de Paleontologia of the Instituto de Geologia, Universidad Nacional Autonoma de Mexico. Types are in the type collection and classified under the acronym IGM. The type locality is registered in the locality catalogue of the Museo de Paleontogia.

Primary reference: F. J. Vega and M.D.C. Perrilliat. 1995. On some Paleocene invertebrates from the Potrerillos Formation (Difunta Group), northeastern Mexico. Journal of Paleontology 69(5):863-869 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42471: authorized by Austin Hendy, entered by Austin Hendy on 29.07.2004

Creative Commons license: CC BY (attribution)