Also known as Canadon Hondo

Where: Chubut, Argentina (45.4° S, 67.7° W: paleocoordinates 48.0° S, 57.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Riochican mammal zone, Las Flores Formation (Río Chico Group), Riochican (57.0 - 55.8 Ma)

• Mid–late Ypresian; Upper Las Flores Formation (e.g. Visser Member sensu Andreis, 1977); Kibenikhoria Faunal Zone of Simpson (1935), previously assigned to Itaboraian SALMA, but revised to Riochican SALMA by Vera and Krause (2020)

• group of beds-level stratigraphic resolution

Environment/lithology: alluvial fan; medium-grained, coarse sandstone

Size classes: macrofossils, mesofossils

Collected by Piatnitzky, Scarritt Expedition, Feruglio in 1931; 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 14205: authorized by John Alroy, entered by Jill Wertheim on 23.05.2002, edited by Richard Butler, Terri Cleary, Jelle Zijlstra and Philip Mannion

Creative Commons license: CC BY (attribution)