84km northwest of Ojinaga (Cretaceous of Mexico)

Also known as Mosasaur locality

Where: San Antonio El Bravo, Mexico (30.2° N, 104.8° W: paleocoordinates 32.1° N, 72.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Ojinaga Formation, Turonian (93.9 - 89.8 Ma)

• "Middle Member"

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; shale and marl

• "Open shelf"
• According to the section measured by the Servicio Geol√≥gico Mexicano (SGM), at the site of the discovery of the specimen (Figure 1), the Ojinaga Fm. thickness is approximately 714 m (Wolleben, 1965) and consists of a series of interbedded, dark gray shales, marls and thin mudstone with Inoceramus sp. and layers with ferrous concretions.

Size class: macrofossils

Preservation: concretion

Collection methods: Oficina Regional Chihuahua (ORC) of the Servicio Geológico Mexicano (SGM)

Primary reference: A. L. Flores. 2013. Occurence of a tylosaurine mosasaur (Mosasauridae; Russellosaurina) from the Turonian of Chihuahua State, Mexico. Boletin de la Sociedad Geologica Mexicana 65(1):99-107 [P. Mannion/J. Tennant/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 142743: authorized by Philip Mannion, entered by Jonathan Tennant on 16.04.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Mosasauridae
Tylosaurus cf. kansasensis Everhart 2005 mosasaur
SGM-M1, skull