Cerro Blanco, Casamayoran: Bartonian, Argentina
collected by Scarritt Expedition 1930

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Notoungulata - Oldfieldthomasiidae
Oldfieldthomasia debilitata (Ameghino 1901)
Simpson 1967
original and current combination Acoelodus debilitatus
AMNH 28600, cranium
Mammalia - Notoungulata
Notopithecus sp. Ameghino 1897
Reguero and Prevosti 2010
Mammalia - Astrapotheria - Trigonostylopidae
Albertogaudrya unica Ameghino 1901
Simpson 1967 2 specimens
AMNH 28641, symphysis; AMNH 28640, dentary m3
Mammalia - Polydolopidae
Eudolops tetragonus Ameghino 1897
Marshall 1982 1 specimen
AMNH 28435, a fragment of a right mandibular ramus with M2-3 complete
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 45.8° South, 69.0° West (view map)
Paleocoordinates:48.1° South, 59.6° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Bartonian 10 m.y. bin:Cenozoic 3
Key time interval:Bartonian Zone: Barrancan
Age range of interval:41.30000 - 38.00000 m.y. ago
Stratigraphy
Stratigraphic resolution:group of beds
Stratigraphy comments: "Casamayoran" SALMA (now subdivided into the Vacan and Barrancan SALMAs, both of Middle Eocene age).

Barrancan SALMA according to Cifelli (1985).
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Museum repositories:AMNH
Collectors:Scarritt Expedition Collection dates:1930
Metadata
Database number:175744
Authorizer:R. Butler, J. Zijlstra Enterer:R. Butler, J. Zijlstra
Modifier:M. Kouvari Research group:vertebrate
Created:2016-01-09 03:23:56 Last modified:2020-09-22 03:14:18
Access level:the public Released:2016-01-09 03:23:56
Creative Commons license:CC BY
Reference information

Primary reference:

57836. R. Cifelli. 1985. Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. American Museum Novitates 2820:1-26 [J. Zijlstra/J. Zijlstra]

Secondary references:

57557 L. G. Marshall. 1982. Systematics of the extinct South American marsupial family Polydolopidae. Fieldiana Geology 12:1-109 [R. Butler/R. Butler]
58079 M. A. Reguero and F. J. Prevosti. 2010. Rodent-like notoungulates (Typotheria) from Gran Barranca, Chubut Province, Argentina: phylogeny and systematics. In R. H. Madden, A. A. Carlini, M. G. Vucetich, R. F. Kay (eds.), The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia 148-165 [J. Zijlstra/J. Zijlstra]
10312 G. G. Simpson. 1967. The beginning of the age of mammals in South America. Part II. Bulletin of the American Museum of Natural History 137:1-260 [D. Croft/D. Croft/K. Pino]