Where: La Pampa, Argentina (36.7° S, 64.3° W: paleocoordinates 36.9° S, 62.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Huayquerian mammal zone, Cerro Azul Formation, Huayquerian (8.0 - 5.0 Ma)

• Romano et al. 2023: Biochronological methods were useful in ordering and estimating the age of the different faunas of the Cerro Azul Formation, ranging from ca. 8 to ca. 5.7 Ma. Some appear to be transitional between Chasicoan and “Huayquerian” faunas (Cerro La Bota, Cerro Patagua, and Algarrobo del Águila), and other three (Barrancas Coloradas, El Guanaco, and Caleufú) cover the latest Miocene, even some of them could have reached the earliest Pliocene. The Cerro Azul Formation localities cover the range between ca. 8 to ca. 5.7 Ma (late Tortonian–Messinian; Late Miocene; Fig. 3; Supplementary Online Information 1, Tab. S8). 7.088 Ma (6.564 - 7.534 Ma) for Don Mariano.

Environment/lithology: terrestrial; massive, red, sandy siltstone

Size classes: macrofossils, mesofossils

Primary reference: D. H. Verzi, E. C. Vieytes, and C. I. Montalvo. 2011. Dental evolution in Neophanomys (Rodentia, Octodontidae) from the late Miocene of central Argentina. Geobios 44(6):621-633 [C. Jaramillo/J. Carrillo]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192135: authorized by Carlos Jaramillo, entered by Juan Carrillo on 12.03.2018, edited by Miranta Kouvari, Philip Mannion and Kateryn Pino

Creative Commons license: CC BY (attribution)