Where: Coahuila, Mexico (28.7° N, 102.5° W: paleocoordinates 30.5° N, 70.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Eagle Ford Group, Early/Lower Turonian to Early/Lower Turonian (93.5 - 89.3 Ma)

• Presence of the foraminifera Helvetoglobotruncana helvetica (Bolli, 1945) and Whiteinella baltica Douglas and Rankin, 1969 [also reported from the age-equivalent Cuautla Formation in southern Mexico (Aguilera-Franco, 2003)], and of the bivalve Mytiloides (Inoceramus) labiatus (Schlotheim, 1813) in rocks that include crustacean remains, suggest that this assemblage is lower to middle Turonian age.

Environment/lithology: offshore; lithified lime mudstone

Size class: macrofossils

Collection methods: Repository: Museo de Múzquiz, Múzquiz, Coahuila (MUZ), Colección Nacional de Paleontología, Instituto de Geología, UNAM (CPC)

Primary reference: F. J. Vega, T. Nyborg, A. Rojas-Briceno, P. Patarroyo, J. Luque, H. Porras-Muzquiz, and W. Stinnesbeck. 2007. Upper Cretaceous Crustacea from Mexico and Colombia: similar faunas and environments during Turonian times. Revista Mexicana de Ciencias Geologicas 24(3):403-422 [C. Schweitzer/E. Johnson/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133857: authorized by Carrie Schweitzer, entered by Evaline Johnson on 30.09.2012

Creative Commons license: CC BY (attribution)