Where: Santa Cruz, Argentina (47.1° S, 66.1° W: paleocoordinates 48.3° S, 58.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: San Julian Formation, Chattian (28.1 - 23.0 Ma)

• The specimens of Peonza n. gen. from the Golfo San Jorge basin were obtained in the shell bed at the top of the San Julian Formation. The San Julián Formation has been variously attributed an early Eocene to early Miocene (Panza et al. 1995, Parras & Casadío 2005), or late Eocene to early Oligocene age based on the microfossil fauna (Bertels 1970, 1975, 1979, Náñez 1990, Náñez et al. 2009, Malumián et al. 1998, Malumián 1999). Recently, 87Sr/86Sr isotopic dating yielded a late Oligocene age (Parras & Casadío 2002, Parras et al. 2012).

• bed-level stratigraphic resolution

Environment/lithology: shoreface; lithified, shelly/skeletal sandstone

Size class: macrofossils

Preservation: coquina, shellbed

Collected by H. Camacho in 1986, 1988

• Repository: Catedra de Paleontologia Collection, Universidad de Buenos Aires (CPBA)

Primary reference: A. M. Olivera, W. J. Zinsmeister, and S. G. Parma. 1994. Peonza: New Gastropod Genus from the Middle Tertiary of Patagonia and Chile. Journal of Paleontology 68(2):279-286 [M. Clapham/B. Santos/B. Santos]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 205658: authorized by Matthew Clapham, entered by Brooke Santos on 18.10.2019

Creative Commons license: CC BY (attribution)