Valle del Tonco: Bartonian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Notoungulata - Archaeohyracidae
Archaeohyracidae informal gen. et sp. indet. 1
García-López et al. 2020
PVL 4362
aff. Eohyrax sp. Ameghino 1901
García-López et al. 2020
IBIGEO-P 2
Mammalia - Notoungulata
Toxodontia indet. Ameghino 1887
IBIGEO-P 12
see common names

Geography
Country:Argentina State/province:Salta
Coordinates: 25.5° South, 65.9° West (view map)
Paleocoordinates:26.5° South, 55.7° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Eocene
Stage: Bartonian 10 m.y. bin: Cenozoic 3
Key time interval: Bartonian
Age range of interval: 41.2 - 37.71 m.y. ago
Stratigraphy
Formation:Quebrada de los Colorados
Stratigraphic resolution:bed
Stratigraphy comments: Lower levels of the Quebrada de los Colorados Formation (LC I); late middle Eocene

Powell et al., 2011: Recently, geologic and paleontologic evidence allowed the correlation of the upper levels of Lumbrera with Geste, Casa Grande, and Quebrada de los Colorados Formations. Additionally, these levels were referred to the late-middle Eocene (Casamayoran SALMA -South American Land Mammal Age-, Barrancan subage) by an U/Pb dating of 39.9 Ma . The lower levels of the Lumbrera Formation are here referred to the Vacan subage of the Casamayoran SALMA.
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:field collection
Reason for describing collection:taxonomic analysis
Metadata
Also known as:Tonco Valley; 10 km north to Mina Don Otto
Database number:58765
Authorizer:D. Croft, P. Mannion Enterer:D. Croft, P. Mannion
Modifier:M. Kouvari Research group:vertebrate
Collections that are a subset of this one:176059
Created:2006-02-23 13:47:44 Last modified:2025-02-22 15:12:02
Access level:the public Released:2006-02-23 13:47:44
Creative Commons license:CC0
Reference information

Primary reference:
62574. D. A. García-López, J. Babot, R. González and A. Scanferla. 2018. Cranial anatomy of an Eocene notoungulate mammal from northwestern Argentina with special reference on the ear region. Historical Biology 30(7):957-975 [P. Mannion/P. Mannion/P. Mannion]

Secondary references:

73059 D. A. García-López, J. N. Gelfo, A. Scanferla, J. Babot, A. Ferro and L. S. Saade. 2020. The Pre-Oligocene Diversity of Hypsodont Typotherians (Mammalia, Notoungulata) in Northwestern Argentina. Ameghiniana 57(2):117-131 [P. Mannion/P. Mannion]