Where: Argentina (48.9° S, 71.5° W: paleocoordinates 50.7° S, 38.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Rio Mayer Formation (Pueyrredon Group), Late/Upper Aptian (122.5 - 113.0 Ma)

• upper Rio Mayer Formation

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, black shale

Size class: macrofossils

Primary reference: M. B. Aguirre-Urreta. 1986. Aptian ammonites from the argentinian Austral Basin. The Subfamily Helicancylinae Hyatt, 1894. Annals of the South African Museum 96(7):271-314 [M. Aberhan/S. Nurnberg/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66631: authorized by Wolfgang Kiessling, entered by Uta Merkel on 12.10.2006, edited by Sabine Nürnberg

Creative Commons license: CC BY (attribution)