Paso Piuquenes (Cretaceous of Argentina)

Where: Mendoza, Argentina (33.6° S, 69.9° W: paleocoordinates 33.2° S, 34.4° W)

• coordinate stated in text

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

• The Agrio Formation is some 120 m thick here but is incomplete, as it is cut by a thrust.

Environment/lithology: fine-grained, gray, yellow limestone and green shale

• n is some 120 m thick here but is incomplete, as it is cut by a thrust. The lower part is mostly composed of intercalations of massive and finely-laminated grey and yellowish limestones, bearing in some levels Steinmanella sp., Thalassinoides sp. and poorly preserved flattened ammonites.

Size class: macrofossils

Preservation: adpression

Collected by M.B. Aguirre Urreta

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 135507: authorized by John Alroy, entered by Julieta Martinelli on 27.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Holcodiscidae
Spitidiscus kilapiae Rawson and Aguirre-Urreta 2012 ammonite
sp. nov