Umala, La Paz (Pliocene to of Bolivia)

Where: La Paz, Bolivia (18.8° S, 66.2° W: paleocoordinates 19.0° S, 65.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Umala Formation, Montehermosan to Montehermosan (5.0 - 3.0 Ma)

• This collection had a E. Pliocene but changed it to Montehermosan-Chapadmalalan.

•Boscaini et al 2018: a horizon bounded below by Toba 76 and above by another volcanic level, the 2.8 Ma Ayo Ayo tuff ; its age is Montehermosan- Chapadmalalan (early and middle Pliocene).

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: L. G. Marshall and T. Sempere. 1991. The Eocene to Pleistocene vertebrates of Bolivia and their stratigraphic context: a review. In R. Suárez-Soruco (ed.), Fósiles y Facies de Bolivia - Vol. 1 Vertebrados (Revista Ténica de YPFB) 12(3-4):631-652 [D. Croft/D. Weinstein/S. Bruning]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 70641: authorized by Darin Croft, entered by Deborah Weinstein on 01.04.2007, edited by Grace Varnham and Carlos Jaramillo

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Polydolopimorphia - Argyrolagidae
Microtragulus bolivianus Hoffstetter and Villarroel 1974 metatherian
 Paucituberculata - Caenolestidae
? Caenolestidae indet. Trouessart 1898 marsupial
 Theriamorpha - Didelphoidae
"Didelphoidea indet." = Didelphoidae, Sparassocynus heterotopicus n. sp.2
"Didelphoidea indet." = Didelphoidae Gray 1821 marsupial
Sparassocynus heterotopicus n. sp.2 Villarroel and Marshall 1983 marsupial
MNHN-BOL-011896
 Notoungulata - Toxodontidae
Posnanskytherium desaguaderoi Liendo Lazarte 1943 notoungulate
  - Mylodontidae
Mylodontinae indet. Gill 1872 edentate
 Megatherioidea - Megatheriidae
cf. Megatherium sp. Cuvier 1796 edentate
 Cingulata - Dasypodidae
Macroeuphractus sp. Ameghino 1887 armadillo
 Cingulata - Pampatheriidae
cf. Plaina sp. Castellanos 1927 edentate
 Panameriungulata - Macraucheniidae
cf. Promacrauchenia sp. Ameghino 1904 placental
 Rodentia - Hydrochoeridae
 Rodentia - Ctenomyidae
"Praectenomys rhombidens" = Praectenomys rhombidens, "Praectenomys vagus" = Praectenomys rhombidens
"Praectenomys rhombidens" = Praectenomys rhombidens Quintana 1994 caviomorph
"Praectenomys vagus" = Praectenomys rhombidens Quintana 1994 caviomorph