Where: Catamarca, Argentina (27.5° S, 66.9° W: paleocoordinates 27.8° S, 64.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Las Arcas Formation (Santa María Group), Tortonian (11.6 - 7.2 Ma)

• Armella et al. 2018: The fossiliferous levels at the western slope of the Cerro Pampa correspond to the Las Arcas Formation, which contacts in discordance with the igneous and metamorphic rocks of the basement. The Las Arcas Formation is part of the Santa María Group (Galvan and Ruíz Huidobro, 1965; Bossi and Palma, 1982; Bossi et al.,1998,1999, 2001; Georgieff et al., 2014) (Fig. 2). Las Arcas Formation is located below the volcanic conglomerate El Aspero (middle member of the Chiquimil Formation) that, based on a radiosotopic 40Ar/39Ar date of 9.14 ± 0.09 Ma (Sasso, 1997), corresponds to the early late Miocene (Lower Tortonian; Fig. 2).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, medium sandstone and massive siltstone

Size class: macrofossils

Collection methods: Armella et al. 2018: material is housed at Coleccion Paleontología Vertebrados Lillo, Tucuman, Argentina;

Primary reference: M. A. Armella, N. L. Nasif, and E. Cerdeño. 2018. Small-sized mesotheriines (Mesotheriidae, Notoungulata) from Northwestern Argentina: Systematic, chronological, and paleobiogeographic implications. Journal of South American Earth Sciences 83:14-26 [P. Mannion/G. Varnham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 202352: authorized by Philip Mannion, entered by Grace Varnham on 09.07.2019

Creative Commons license: CC BY (attribution)