Where: New Mexico (32.5° N, 107.7° W: paleocoordinates 33.2° N, 72.1° W)

• coordinate stated in text

When: Mantelliceras dixoni ammonoid zone, Sarten Member (Mojado Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• top of the Sarten Sandstone resting disconformably on an equivalent of the Anapra Sandstone in El Paso, Texas

Environment/lithology: marine; lithified, nodular, sandy limestone

Size class: macrofossils

Preservation: mold/impression

Collected by W. A. Cobban in 1978; reposited in the USNM

Primary reference: W. A. Cobban. 1987. Ammonite Faunas of the Sarten Sandstone (Cretaceous), Luna County, New Mexico. United States Geological Survey Bulletin (1641-B) [M. Clapham/K. Okamoto]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 179779: authorized by Matthew Clapham, entered by Kristina Okamoto on 30.06.2016

Creative Commons license: CC BY (attribution)