Where: Rivera, Uruguay (31.9° S, 54.6° W: paleocoordinates 48.1° S, 30.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Estrada Nova Formation, Roadian to Roadian (272.3 - 259.5 Ma)

• Cox (1934) describes these fossils as Triassic, but the Estrada Nova Fm. has since been dated as Middle Permian, so the age here is based on that of other collections from the same formation

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; sandstone

Size class: macrofossils

Preservation: mold/impression

Collected by J. D. Falconer, D. Rey Vercesi; reposited in the BMNH

Primary reference: L. R. Cox. 1934. Triassic Lamellibranchia from Uruguay. Annals and Magazine of Natural History 13(74):264-273 [A. Dunhill/B. Allen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 206588: authorized by Alex Dunhill, entered by Bethany Allen on 20.11.2019

Creative Commons license: CC BY (attribution)