Where: Argentina (48.9° S, 71.9° W: paleocoordinates 50.7° S, 39.0° W)

• outcrop-level geographic resolution

When: Rio Mayer Formation, Late/Upper Aptian (122.5 - 113.0 Ma)

• STRATIGRAPHIC RELATIONS: Lower Rio Mayer Fm, and underlying Piedra Clavada Fm (Late Aptian). AGE: Late Aptian as underlying Aptian index taxa including P. russoi. STRATIGRAPHIC POSITION: Beds of unknown thickness and lithology of Rio Mayer Fm, immediately above PBDB# 64157 and PBDB# 64159 of the Rio Mayer Fm.

• bed-level stratigraphic resolution

Environment/lithology: marinelithified

Size class: macrofossils

Reposited in the MLP

• COLLECTOR: Unknown collector. Previously reported by Pianitzky (1938), Feruglio (1949), Ramos (1982), Leanza (1970), Aguirre Urreta (1985), Riccardi et al. (1987) and Riccardi and Medina (2002). REPOSITORY: MLP (Museo de la Plata, Argentina).

Primary reference: F. A. Medina and A.C. Riccardi. 2005. Desmoceratidae, Silesitidae and Kossmaticeratidae (Ammonitida) from the Upper Aptian-Albian of Patagonia (Argentina). Revue de Paleobiologie, Geneve 24(1):251-286 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64158: authorized by Austin Hendy, entered by Austin Hendy on 02.09.2006

Creative Commons license: CC BY (attribution)