Where: Chubut, Argentina (43.0° S, 67.6° W: paleocoordinates 45.5° S, 57.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Paleogene (66.0 - 23.0 Ma)

• -The fossil remains were recovered from unnamed beds at the Puesto Baibián locality.

•-For the purposes of this article, we can say that the Baibián Beds are definitely post-Paleocene in age and that they preceded the deposition of the Late Oligocene–Early Miocene Sarmiento Group in the same area.

•

•-These beds, which we informally name here in as the Baibián Beds, overlie the Late Cretaceous La Colonia Formation and are overlain by altered basaltic lavas of unknown age, which in turn are overimposed by the tuffaceous Sarmiento Group.

Environment/lithology: fluvial; lithified conglomerate

Size class: macrofossils

• Other common parts: Infructescences

Preservation: cast, mold/impression, adpression, permineralized, original cellulose

Collection methods: Fossils are housed at the Paleobotanical Collection of the Museo Paleontológico Egidio Feruglio, Chubut, Argentina (MPEF Pb 2010–2013, 2408, and 2409, MPEF Palin).

Primary reference: M. A. Gandolfo, M. Zamaloa, N. R. Cúneo and A. Archangelsky. 2009. Potamogetonaceae Fossil Fruits from the Tertiary of Patagonia, Argentina. International Journal of Plant Sciences 170(3):419-428 [C. Jaramillo/J. Moreno/J. Moreno]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152926: authorized by Carlos Jaramillo, entered by Jessica Moreno on 03.12.2013

Creative Commons license: CC BY (attribution)