Where: Coahuila, Mexico (28.6° N, 102.9° W: paleocoordinates 35.0° N, 76.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Pen Formation, Campanian (83.5 - 70.6 Ma)

• marine member of this formation

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; shale

Size class: macrofossils

Collection methods: surface (float),

Primary reference: H. E. Rivera-Sylva, K. Carpenter, and F. J. Aranda-Manteca. 2011. Late Cretaceous nodosaurids (Ankylosauria: Ornithischia) from Mexico. Revista Mexicana de Ciencias Geológicas 28(3):371-378 [M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 127272: authorized by Philip Mannion, entered by Philip Mannion on 07.05.2012, edited by Matt Carrano