Where: Nuevo León, Mexico (25.4° N, 100.1° W: paleocoordinates 23.9° N, 54.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dufrenoyia justinae ammonoid zone, La Peña Formation, Early/Lower Aptian (121.4 - 122.5 Ma)

• Dufrenoyia scotti/Burckhardtites nazasensis subzone

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified lime mudstone

Size class: macrofossils

Collection methods: Repository: Museo María del Carmen Perrilliat M., Colección Nacional de Paleontología, Instituto de Geología, UNAM, Ciudad de Mexico, Mexico

Primary reference: R. Barragán, J. A. Moreno-Bedmar, F. Núñez-Useche, L. F. Álvarez-Sánchez, and G. Delanoy. 2021. Ammonite biostratigraphy of two stratigraphic sections of the La Peña Formation (Aptian, Lower Cretaceous) in Nuevo León State, northeast Mexico. Cretaceous Research 125(104862) [M. Clapham/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 220663: authorized by Matthew Clapham, entered by Matthew Clapham on 12.06.2021

Creative Commons license: CC BY (attribution)