Where: Río Negro, Argentina (40.7° S, 67.2° W: paleocoordinates 43.5° S, 53.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Middle Member (Allen Formation), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• "The sediments are compared to those from the Pellegrini lake area referred to the middle member of the Allen Formation."

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; mudstone and fine-grained sandstone

Size class: macrofossils

Collection methods: Museo Municipal de Ciencias Naturales "Carlos Darwin" of the city of Punta Alta, Buenos Aires Province MPA 86-86-1C

Primary reference: M. de la Fuente, F. de Lapparent de Broin, and T. M. Bianco. 2001. The oldest and first nearly complete skeleton of a chelid, of the Hydromedusa sub-group (Chelidae, Pleurodira), from the Upper Cretaceous of Patagonia. Bulletin de la Société Géologique de France 172(2):237-244 [J. Alroy/E. Leckey/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37039: authorized by John Alroy, entered by Erin Leckey on 24.02.2004, edited by Roger Benson and Matthew Carrano

Creative Commons license: CC BY (attribution)