Where: Chubut, Argentina (45.1° S, 68.4° W: paleocoordinates 47.5° S, 59.1° W)
• coordinate based on political unit
• local area-level geographic resolution
When: Barrancan zone, Bartonian (41.3 - 38.0 Ma)
• Casamayoran SALMA. Cifelli (1985) gives a faunal list but no explicit discussion of this site's age. Because all of its taxa are shared with the Barrancan fauna of Gran Barranca and none with the Vacan fauna of Cañadón Vaca, it is allocated to the Barrancan here.
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•The Barrancan is Middle Eocene according to Woodburne et al. (2014).
• group of beds-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size class: mesofossils
Collected by Tournouër in 1898-1902
Primary reference: R. Cifelli. 1985. Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. American Museum Novitates 2820:1-26 [J. Zijlstra/J. Zijlstra]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 176167: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 30.01.2016, edited by Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
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Archaeohyracidae indet.2 Ameghino 1897 notoungulate "?Eohyrax or ?Pseudhyrax sp." Simpson suggested this specimen may be from the Mustersan.
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Anisotemnus distentus2 Ameghino 1901 notoungulate MHN Tournouër 30, maxilla P1-M3; MHN Tournouër 35, maxilla with M2 and doubtfully associated M3; MHN Tournouër 26, dentary p2, p4-m3
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Coona gaudryi n. sp.1
Coona gaudryi n. sp.1 Simpson 1964 marsupial MNHN CAS 21, dentary m1-2 (lectotype); MNHN CAS 22, dentary p3, partial m3
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Polydolops thomasi1 Ameghino 1897 metatherian MNHN CAS 29, dentary m2; CAS 61, dentary m1-2; CAS 62, dentary m1-2 and associated p3; CAS 65, m1; CAS 66, M1; CAS 67, M2; CAS 68, M1
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