Where: Río Negro, Argentina (41.3° S, 68.7° W: paleocoordinates 43.9° S, 55.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Angostura Colorada Formation, Campanian to Campanian (83.5 - 65.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by R. M. Casamiquela in 1964

Primary reference: J. F. Bonaparte. 1996. Cretaceous tetrapods of Argentina. Münchner Geowissenschaften Abhandlungen 30:73-130 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 58573: authorized by Matt Carrano, entered by Matt Carrano on 14.02.2006