Where: Río Negro, Argentina (38.8° S, 68.1° W: paleocoordinates 41.5° S, 53.6° 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)

• Middle Member of Allen Formation

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; sandstone and shale

Size class: macrofossils

• Four cervical vertebrae, two dorsal vertebrae, a fragment of scapula?, a tarsal or carpal elementand four phalanges.

Collection methods: surface (in situ),

Primary reference: J. P. O'Gorman, Z. Gasparini, and L. Salgado. 2013. Postcranial morphology of Aristonectes (Plesiosauria, Elasmosauridae) from the Upper Cretaceous of Patagonia and Antarctica. Antarctic Science 25(1):71-82 [P. Mannion/P. Mannion/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 140325: authorized by Philip Mannion, entered by Philip Mannion on 07.03.2013, edited by Jonathan Tennant

Creative Commons license: CC BY (attribution)