Where: Mendoza, Argentina (34.9° S, 68.6° W: paleocoordinates 51.5° S, 34.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rio Seco de la Quebrada Formation (Puesto Viejo Group), Carnian (237.0 - 228.0 Ma)

• "The Rio Seco de la Quebrada Formation was originally correlated to the Cynognathus AZ of South Africa (Bonaparte, 1982), and suggested an Olenekian (e.g., Bonaparte, 1966b, 1973, 1982; Lucas, 1998) or Anisian age (Bonaparte, 1966c, 1967). Recently, it was correlated to the subzones B and C of the Cynognathus AZ based exclusively on its cynodont content" (Martinelli 2010). This fauna is also known as the Puesto Viejo Local Fauna. Elsewhere (e.g. Fröbisch 2009), the Rio Seco de la Quebrada has been referred to as the "Upper fauna of the Puesto Viejo Formation"

•

•Ottone et al. (2014) provided a SHRIMP U-Pb age for an ignimbrite at the top of the underlying Quebrada de los Fosiles Formation. This date of 235.8 ± 2.0 Ma suggests an early Carnian age for the Rio Seco de la Quebrada, in contrast to the biostratigraphic age estimates provided by previous workers.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by González Díaz & Zuñega in 1961–1963; reposited in the MLP

Primary reference: J. F. Bonaparte. 1966. Una nueva "fauna" Triasica de Argentina (Therapsida: Cynodontia Dicynodontia). Consideraciones filogeneticas y paleobiogeograficas. Ameghiniana 4(8):243-296 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98604: authorized by Richard Butler, entered by Richard Butler on 14.10.2010

Creative Commons license: CC BY (attribution)