Where: Río Negro, Argentina (39.1° S, 67.7° W: paleocoordinates 42.1° S, 52.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Anacleto Formation (Neuquén Group), Early/Lower Campanian to Early/Lower Campanian (83.5 - 70.6 Ma)

• formation assignment questionable; Río Colorado Subgroup. Egg from the lower part of the "classic Rocanian locality of General Roca"

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, gray, red sandstone and coarse-grained, concretionary, brown, red, calcareous sandstone

Size classes: macrofossils, mesofossils

Collected by R. Wichmann in 1912-1916; reposited in the MACN

Collection methods: quarrying, surface (float), surface (in situ),

Primary reference: J. Frenguelli. 1951. Un huevo fósil del Rocanense [A fossil egg from the Rocanian]. Revista de la Asociación Geológica Argentina 6(2):108-112 [M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51580: authorized by Matt Carrano, entered by Matt Carrano on 08.06.2005, edited by Roger Benson