Where: Coahuila de Zaragoza, Mexico (29.3° N, 100.9° W: paleocoordinates 28.7° N, 66.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Del Rio Clay Formation, Middle Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Del Rio Clay, for which lithostratigraphic relations are not clearly stated. AGE: Middle Cenomanian; on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From the Del Rio Clay.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified claystone

Size class: macrofossils

Preservation: mold/impression

Collected by Bose; reposited in the UCMP

Collection methods: surface (in situ),

• COLLECTOR: Not stated, but presumably E. Böse. REPOSITORY: University of California, Berkeley.

Primary reference: E. Böse. 1928. Cretaceous ammonites from Texas and northern Mexico. University of Texas Bulletin 2748:143-357 [A. Hendy/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88222: authorized by Austin Hendy, entered by Austin Hendy on 04.04.2009

Creative Commons license: CC BY (attribution)