S12, Palmar Lake (Cretaceous of Uruguay)

Where: Uruguay (33.1° S, 57.3° W: paleocoordinates 36.1° S, 44.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Queguay Formation, Maastrichtian (72.1 - 66.0 Ma)

• Some papers give a Paleogene age, but Late Cretaceous is more likely based on the abundance of sauropod eggshells. Veroslavsky et al. (2019) dated carbonates in the Queguay Formation at around 72 Ma.

• group of beds-level stratigraphic resolution

Environment/lithology: pond; lithified limestone

• Pedogenic and palustrine carbonates

Size class: macrofossils

Collection methods: Repository: Paleontological Collection of the Facultad de Ciencias, Montevideo, Uruguay (FCDPI)

Primary reference: F. Cabrera, S. Martínez, and M. Verde. 2018. Continental Late Cretaceous gastropod assemblages from Uruguay. Paleoecology, age, and the oldest record of two families and a genus. Historical Biology 32:93-103 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 231036: authorized by Matthew Clapham, entered by Matthew Clapham on 01.08.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Stylommatophora - Pupillidae
Pupoides (Ischnopupoides) gnocco1
Pupoides (Ischnopupoides) gnocco1 Cabrera and Martínez 2017 slug
 Stylommatophora - Succineidae
Succineidae indet.
Succineidae indet. Beck 1837 amber snail
 Heterostropha - Physidae
Physa sp.
Physa sp. Draparnaud 1801 snail
 Heterostropha - Planorbidae
Biomphalaria reversa n. sp.2, Biomphalaria walteri
Biomphalaria reversa n. sp.2 Cabrera et al. 2016 snail
Biomphalaria walteri Parodiz 1969 snail
1Cabrera and Martínez 2017; 2Cabrera et al. 2016