Where: Neuquen, Argentina (38.5° S, 70.0° W: paleocoordinates 38.0° S, 33.8° W)

• coordinate stated in text

When: Agua de la Mula Member (Agrio Formation), Late/Upper Hauterivian (136.4 - 130.0 Ma)

• A partial exposure of the Agrio Formation includes the Avilé Member and the base of the Agua de la Mula Member.

Environment/lithology: marine; black shale

Size class: macrofossils

Preservation: mold/impression

Primary reference: P. F. Rawson and M. B. Aguirre-Urreta. 2012. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus. Cretaceous Research 33:97-105 [J. Alroy/J. Martinelli]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 135519: authorized by John Alroy, entered by Julieta Martinelli on 27.10.2012

Creative Commons license: CC BY (attribution)