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)
Taxonomic list
unclassified | |
Vertebrata indet. Lamarck 1801 MACN 10800, fragmentary dermal scute that could be an armadillo, reptile, or fish
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Mammalia | |
"Proteodidelphys praecursor n. gen. n. sp." = Microbiotherium praecursor
"Proteodidelphys praecursor n. gen. n. sp." = Microbiotherium praecursor Ameghino 1898 marsupial MACN 10799, dentary i3-m4, type. See also ref. 57760.
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Archaeoplus incipiens n. gen. n. sp.
Archaeoplus incipiens n. gen. n. sp. Ameghino 1898 notoungulate MACN 10801, incisor. It is a notoungulate, perhaps an archaeohyracid.
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