Where: Neuquén, Argentina (38.8° S, 67.9° W: paleocoordinates 41.4° S, 56.3° W)

• coordinate stated in text

When: NP3 nannofossil zone, Roca Formation, Danian (66.0 - 61.6 Ma)

Environment/lithology: marine; siltstone

Size class: microfossils

Collection methods: quarrying, chemical, peroxide,

• Twenty-seven outcrop samples were studied, and approximately 20 g of dried rock was crushed and soaked in 200 mL of a hydrogen peroxide solution (H2O2) for 24 h, at a concentration of 35%. Residues were then washed and divided into grain fractions 63, 180 and 250 lm and dried at 60°C. All ostracods were hand-picked under a stereo microscope from each size fraction. Selected specimens were imaged in a EVO MA15 Zeiss scanning electron microscope at the Instituto Tecnologico de Micropaleontologia (itt Fossil) of the Universidade do Vale do Rio dos Sinos, Brazil.

Primary reference: D. Ceolin, R. Whatley, G. Fauth and A. Concheyro. 2015. New genera and species of Ostracoda from the Maastrichtian and Danian of the Neuquén Basin, Argentina. Papers in Palaeontology 1(4): 425-495 [P. Wagner/P. Wagner/E. Vlachos]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232009: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 10.10.2023

Creative Commons license: CC BY (attribution)