Also known as Quebrada de Humahuaca

Where: Jujuy, Argentina (23.2° S, 65.4° W: paleocoordinates 23.3° S, 64.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Uquía Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)

• Ortiz et al. 2012: The remains were excavated from levels assigned to the middle Unit of the Uquía Formation (late Pliocene) (sensu Castellanos, 1950; see also Reguero et al., 2007). Although the bearing deposit at the type locality does not show obvious stratigraphic relationships with respect to dated levels from nearby locations, we propose a correlation between the deposit that yielded the †Pardinamys remains and the middle unit in Esquina Blanca, where the stratotype of the Uquía Formation crops out (Marshall et al., 1982; Reguero et al., 2007). This stratigraphic correlation was possible because of the presence of indicative guide levels, including tuffaceous beds, reddish-brown claystones, and the short distances between these outcrops. These correlations allowed us to estimate an age between 3 and 2.5 Ma for †Pardinamys.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; siltstone and silty claystone

Size class: macrofossils

Collected by P. Ortiz and collaborators

Collection methods: sieve

• Ortiz et al. 2012: Specimens were collected by P. Ortiz and collaborators and are housed in the fossil vertebrate collection of the Instituto Miguel Lillo (PVL), San Miguel de Tucumán, Argentina. The remains come from a bone accumulation generated by the feeding activity of owls that includes several small mammal species, such as marsupials and rodents, as well as remains of small birds, lizards, and frogs. The material was obtained through dry and wet sieving with a mesh of 0.1 mm according to the methodology of McKenna et al. (1994).

Primary reference: P. E. Ortiz, J. P. Jayat, and S. J. Steppan. 2012. A New fossil phyllotine Rodentia Sigmodontinae from the late Pliocene in the Andes of northern Argentina. Journal of Vertebrate Paleontology 32(6):1429-1441 [P. Mannion/G. Varnham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 202897: authorized by Philip Mannion, entered by Grace Varnham on 23.07.2019

Creative Commons license: CC BY (attribution)