Trapalcó, locality B (Cretaceous of Argentina)

Where: Río Negro, Argentina (39.9° S, 66.6° W: paleocoordinates 42.3° S, 54.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Jagüel Formation (Malargüe Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• 0.3 m below the Cretaceous/Paleogene boundary

• bed-level stratigraphic resolution

Environment/lithology: marine; mudstone

• shallow inner-platform environment
• Mudstone

Size class: macrofossils

Collected by Hector Cabaza and Museo Municipal de Lamarque in 1998-2001

• MML, Museo Municipal de Lamarque, Rio Negro, Argentina

Primary reference: Z. Gasparini, L. Salgado, and S. Casadio. 2003. Maastrichtian plesiosaurs from northern Patagonia. Cretaceous Research 240:157-170 [P. Mannion/P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 140998: authorized by Philip Mannion, entered by Philip Mannion on 20.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sauropterygia - Elasmosauridae
cf. Mauisaurus sp. Hector 1874 elasmosaur
MML-PV4 (one incomplete cervical vertebra, 13 incomplete dorsals, three sacrals, 24 caudals, two ilia and the left anterior paddle [humerus, radius, ulna, proximal and distal carpals and phalanges])