Where: Pacajes, Bolivia (17.2° S, 69.0° W: paleocoordinates 17.5° S, 66.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: 6 Member (Mauri Formation), Tortonian (11.6 - 7.2 Ma)

• We retained the inverse isochron age at 10.42 ± 0.09 Ma for the tuff below the MNHN-Bol-V 12617 specimen. For the sample ACH-TUF4, we obtained a plateau age of 9.42 ± 0.1 Ma corresponding to 99.39% of 39Ar released (Supplementary Material 5). These 40Ar/39Ar datings confirm that the fossil assemblage from the Cerro Pisakeri, including the pathological specimen, is late Miocene in age (late Mayoan–early Chasicoan South American Land Mammal ages [SALMA], or Tortonian Stage based on Gradstein et al., 2012).

•

•The fossiliferous tuffaceous siltstones are assigned to the mid-part of

•the volcaniclastic Mauri 6 Formation, well documented in the region, long assigned to the Late Miocene (~10.5–9 Ma), and unconformably overlain by the Pérez Ignimbrite (~2.8 Ma; Marshall et al., 1983). In the Cerro Pisakeri, five intercalated tuffs crop out with a 3–6°NW dip, and the MNHN-Bol-V 12617 specimen is bracketed by two of them, which were dated (see below).

• member-level stratigraphic resolution

Environment/lithology: terrestrial; tuffaceous siltstone

Size class: macrofossils

Reposited in the MNHN (La Paz)

• MNHN-Bol

Primary reference: M. Fernández-Monescillo, P.-O. Antoine, B. Mamami Quispe, P. Münch, R. Andradre Flores, L. Marivaux, and F. Pujos. 2019. Multiple skeletal and dental pathologies in a late Miocene mesotheriid (Mammalia, Notoungulata) from the Altiplano of Bolivia: Palaeoecological inferences. Palaeogeography, Palaeoclimatology, Palaeoecology 534:109297 [P. Mannion/M. Kouvari/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 207055: authorized by Philip Mannion, entered by Miranta Kouvari on 18.12.2019

Creative Commons license: CC BY (attribution)