Also known as Lower Chubut Valley

Where: Chubut, Argentina (42.8° S, 65.9° W: paleocoordinates 43.5° S, 59.8° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Early/Lower Miocene (23.0 - 16.0 Ma)

• A small collection collected by Nicolas Illin in the lower Chubut Valley, supposedly from the Cretaceous. There is no evidence for a Cretaceous age of the collection, and the main species from the fauna, _Proteodidelphys praecursor_, is very similar to Early Miocene species of _Microbiotherium_.

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•"Proteodidelphys Fauna" and which proves to be of highly dubious origin and not separable from a species of relatively late (Santa Cruz, probably lowest Miocene) age (see Simpson 1932a).

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by Nicolás Illin; reposited in the MACN

Primary reference: G. G. Simpson. 1932. The supposed occurrences of Mesozoic mammals in South America. American Museum Novitates 530:1-9 [J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176669: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 25.02.2016

Creative Commons license: CC BY (attribution)