Where: Neuquen, Argentina (38.7° S, 70.1° W: paleocoordinates 38.2° 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 section of the Agrio Formation is well exposed. The Avilé Member is not developed as a distinctive unit here.
Environment/lithology: marine; gypsiferous, gray, silty 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 135520: authorized by John Alroy, entered by Julieta Martinelli on 27.10.2012, edited by Franco Aspromonte
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Spitidiscus riccardii Leanza and Wiedmann 1992 ammonite | |
Gastropoda | |
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