Where: Rio Negro, Argentina (41.2° S, 63.1° W: paleocoordinates 41.3° S, 60.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Río Negro Formation, Huayquerian (8.0 - 5.0 Ma)

• Niveles más superiores de los acantilados marino

•

•Assigned to Huayquerian up to probably the earliest Montehermosan Land Mammal Age (i.e. Late Miocene; Pascual & Bondesio 1985). These upper continental levels have long been known as 'Rio- negrense'. and more recently named as the Rio Negro Formation (Andreis 1965). The actual date of these deposits is controversial. Note: the min age of the Huayquerian used to be before the end of the Miocene (and Mintehermosan starting in the latest Miocene). But now, the Huayquerian spans the whole of L. Miocene.

• group of beds-level stratigraphic resolution

Environment/lithology: "floodplain"; lithology not reported

Size class: macrofossils

Primary reference: R. Pascual and P. Bondesio. 1985. mamiferos terrestres del Mioceno medio-tardio de las cuencas de los rios Colorado y Negro (Argentina): Evolucion ambiental. Ameghiniana 22(1-2):133-145 [P. Mannion/M. Kouvari]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 206561: authorized by Philip Mannion, entered by Miranta Kouvari on 20.11.2019

Creative Commons license: CC BY (attribution)