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Bajo de la Palangana (upper levels) (Eocene of Argentina)

Where: Chubut, Argentina (45.4° S, 67.2° W: paleocoordinates 47.9° S, 57.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Riochican mammal zone, Koluel Kaike Formation (Rio Chico Group), Early/Lower Eocene (55.8 - 48.6 Ma)

• 85 to 88 meters above the "Banco Negro Superior" and about six meters below the Casamayor tuffs

•Ernestokokenia Faunal Zone of Simpson (1935), corresponding to the Koluel Kaike Formation and the Riochican SALMA. Riochican SALMA is argued to be late Early Eocene in age (Woodburne et al. 2014).

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; coarse-grained, gray sandstone

• Coarse grey to pink sandstone

Size classes: macrofossils, mesofossils

Collected by Simpson, Brandmayr in 1931, 1934; reposited in the AMNH

• Original specimens are in the Feruglio Collection. Casts in 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 13781: authorized by John Alroy, entered by Jill Wertheim on 25.04.2002, edited by Richard Butler, Jelle Zijlstra, Evangelos Vlachos and Philip Mannion

Creative Commons license: CC BY (attribution)