East of Monterey (Cretaceous to of Mexico)

Where: Nuevo Leon, Mexico (25.8° N, 99.7° W: paleocoordinates 28.5° N, 70.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: San Felipe Formation, Coniacian to Coniacian (89.8 - 83.6 Ma)

• "The matrix of the bones suggests certain parts of the San Felipe formation of the Upper Cretaceous, but this may be entirely misleading. It is likely that the remains are as young or younger than the San Filipe, however."

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary claystone

• "a refractory matrix of concretionary clay considerably harder than the bone."

Size class: macrofossils

Preservation: concretion

Collected by C. D. Johnson

Primary reference: M. G. Mehl. 1930. A new genus of mosasaurs from Mexico, and notes on the pelvic girdle of Platecarpus. Denison University Bulletin, Journal of the Scientific Laboratories 29(10):383-400 [M. Carrano/H. Street/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 107338: authorized by Matthew Carrano, entered by Hallie Street on 05.04.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Squamata - Mosasauridae
Amphekepubis johnsoni n. gen. n. sp.
Amphekepubis johnsoni n. gen. n. sp. Mehl 1930 mosasaur