Rio Chico - RCH 018S (Miocene of Argentina)

Where: Río Negro, Argentina (41.7° S, 70.5° W: paleocoordinates 42.3° S, 66.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Colloncuran mammal zone, Collón Curá Formation, Colloncuran (15.5 - 13.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Museo de La Plata and the Duke University in 1990-1993; reposited in the MLP

• During fieldwork, the outcrops were subdivided into northern (Duke University/MLP Fossil Localities RCH-018 and RCH-018N) and southern exposures (RCH-018S). The specimen of Patagosmilus comes from the latter.

Primary reference: A. M. Forasiepi and A. A. Carlini. 2010. A new thylacosmilid (Mammalia, Metatheria, Sparassodonta) from the Miocene of Patagonia, Argentina. Zootaxa 2552:55-68 [C. Jaramillo/J. Carrillo]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 142148: authorized by Carlos Jaramillo, entered by Juan Carrillo on 06.04.2013, edited by Jelle Zijlstra

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Rodentia -
Guiomys unica1, cf. Microcardiodon williensis2
Guiomys unica1 Pérez 2010 caviomorph
MLP 91-IX-4–3, left mandible with p4–m1; MLP 91-IX- 4–2, right mandible with p4–m2; MLP 91-IX-4–1, palate with both dental series.
cf. Microcardiodon williensis2 Pérez and Vucetich 2011 caviomorph
MLP 91-V-1-88
 Sparassodonta - Thylacosmilidae
Patagosmilus goini n. gen. n. sp.
Patagosmilus goini n. gen. n. sp. Forasiepi and Carlini 2010 metatherian
1Pérez 2010; 2Pérez and Vucetich 2011