Where: Baja California Del Norte, Mexico (30.2° N, 115.7° W: paleocoordinates 35.6° N, 86.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: El Diesacado Member (El Gallo Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; lithology not reported

Size class: macrofossils

Preservation: mold/impression, soft parts

Collected by Tabrum in 1966; reposited in the LACM

Collection methods: quarrying, mechanical,

Primary reference: A. Silva-Bárcenas. 1969. Localidades de vertebrados fósiles en la Republica Méxicana [Vertebrate fossil localities in the Mexican Republic]. Universidad Nacional Autónoma de México, Instituto de Geología, Paleontología Mexicana 28:1-34 [J. Alroy/J. Alroy/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55384: authorized by Matt Carrano, entered by Kaitlin Maguire on 13.10.2005, edited by Matt Carrano