Where: Argentina (39.5° S, 70.3° W: paleocoordinates 39.0° S, 34.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lower Member (Agrio Formation), Early/Lower Hauterivian (136.4 - 130.0 Ma)

• Holcoptychites neuquensis zone, Olcostephanus (O.) laticosta subzone

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface

Size class: macrofossils

Primary reference: M. B. Aguirre-Urreta and P. F. Rawson. 2001. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: a Hauterivian Olcostephanus fauna. Cretaceous Research 22(6):763-778 [W. Kiessling/U. Merkel] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61716: authorized by Wolfgang Kiessling, entered by Uta Merkel on 23.06.2006