Where: Chubut, Argentina (45.3° S, 67.0° W: paleocoordinates 47.8° S, 56.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Carodnian mammal zone, Peñas Coloradas Formation (Río Chico Group), Danian (66.0 - 61.6 Ma)

• Generally regarded as middle or late Paleocene in age (e.g. Gelfo et al. 2009), but the fossil-bearing horizons (Carodnia zone) were dated as late Danian–Selandian by Clyde et al. (2014) and refined to late Danian by Krause et al. (2017)

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•Unit 'h', 36.5-38 metres above the base of the "Banco Negro Inferior."

•Informal Carodnian zone, between Peligran and Itaboraian SALMA. Approximately correlative to the Selandian (Woodburne et al. 2014: fig. 1, J. Mammal Evol 21)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone and claystone

Size classes: macrofossils, mesofossils

Collected by C. S. Williams, O. Garcia Fanjul.; reposited in the AMNH

Primary reference: G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25 [J. Alroy/J. Wertheim/J. Wertheim]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13782: authorized by John Alroy, entered by Jill Wertheim on 25.04.2002, edited by Richard Butler and Philip Mannion

Creative Commons license: CC BY (attribution)