Confluence of the Laguna and Casa Grande Rivers, Casa Grande Formation (Eocene of Argentina)

Where: Jujuy, Argentina (23.3° S, 65.6° W: paleocoordinates 25.6° S, 57.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Barrancan mammal zone, Casa Grande Formation (Salta Group), Bartonian (41.3 - 38.0 Ma)

• 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.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. Fernández; reposited in the MLP

• Museo de La Plata collection

Primary reference: J. E. Powell, M. J. Babot, D. A. García López, M. V. Deraco, and C. Herrera. 2011. Eocene vertebrates of northwest Argentina: annotated list. In J. Salfity, R. A. Marquillas (eds.), Cenozoic Geology of the Central Andes of Argentina 349-370 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176665: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 25.02.2016, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cingulata - Dasypodidae
"Pucatherium parvus n. gen. n. sp." = Pucatherium parvum2
"Pucatherium parvus n. gen. n. sp." = Pucatherium parvum2 Herrera et al. 2012 armadillo
 Notoungulata - Isotemnidae
Isotemnidae indet.1 Ameghino 1897 notoungulate
MLP 72-IV-5-1 and MLP 72-IV-5-8
 Notoungulata - Leontiniidae
Martinmiguelia fernandezi n. gen. n. sp.1
Martinmiguelia fernandezi n. gen. n. sp.1 Bond and López 1995 notoungulate
MLP 72-IV-5-2 - holotype (fragment of left maxilla with complete I1-I3 and P2-M2, and right M2-M3; fragment of right mandible with m3 poorly preserved)