Huayllajara (Miocene of Bolivia)

Also known as B-10-05

Where: Tarija, Bolivia (22.0° S, 65.1° W: paleocoordinates 22.4° S, 61.9° W)

• hand sample-level geographic resolution

When: Honda Group, Serravallian (13.8 - 11.6 Ma)

• Studies ofthe stratigraphic relationships among these areas are ongoing (including paleomagnetic and radioisotopic analyses).

•Similar lithology to Quebrada Honda and the Quebrada Rosario, suggests that it could be of similar age to most specimens from these areas (i.e., Serravallian age, ca. 13 Ma).

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; mudstone

• reddish-brown mudstones similar to those of the basal levels at both Quebrada Honda and the Quebrada Rosario

Size class: macrofossils

Reposited in the MACN, MLP

• McGrath et al 2020: new proterotheriid remains from the Quebrada Honda region that have been collected in recent years through a research collaboration between Case Western Reserve University (Cleveland, Ohio, USA) and the Universidad Autónoma ‘Tomás Frías’ (Potosí, Bolivia) as well as remains collected by earlier expeditions (Hoffstetter, 1977; Takai et al., 1984)

•Olisanophus sp. (UATF-V-001181) was collected from relatively high in section at the Huayllajara Local Area.

Primary reference: D. Brandoni, A. A. Carlini, F. Anaya, P. Gans, and D. A. Croft. 2018. New Remains of Megathericulus patagonicus Ameghino, 1904 (Xenarthra, Tardigrada) from the Serravallian (Middle Miocene) of Bolivia; Chronological and Biogeographical Implications. Journal of Mammalian Evolution 25:327-337 [P. Mannion/M. Kouvari]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 197502: authorized by Philip Mannion, entered by Miranta Kouvari on 14.11.2018, edited by Grace Varnham

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Megatherioidea - Megatheriidae
Megathericulus patagonicus Ameghino 1904 edentate
UATF-V-001163
 Rodentia - Chinchillidae
Miochinchilla plurinacionalis1 Croft et al. 2021 chinchilid
UATF-V-001256; UATF-V-001211
 Panameriungulata - Proterotheriidae
Olisanophus sp.3 McGrath et al. 2020 placental
UATF-V-001181
 Panameriungulata - Macraucheniidae
Llullataruca shockeyi2 McGrath et al. 2018 placental
Theosodon arozquetai2 McGrath et al. 2018 placental