Where: Argentina (25.0° S, 65.0° W: paleocoordinates 41.8° S, 131.7° W)

• local area-level geographic resolution

When: San Bernardo Formation, Arenig (478.6 - 466.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, bioturbated, green, argillaceous shale and sandstone

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: J. C. Gutierrez-Marco and F.G. Acenolaza. 1992. Ribeiria y Tolmachovia (Mollusca, Rostroconchia) en el Ordovicico inferior de la Cordillera Oriental Argentina. Zentrallblatt fuer Geologie une Palaeontologie, Teil I: Allgemeine, angewandte, regionale une historische geologie. 12th Symposium on Latin American geosciences 1991(6):1799-1814 [A. Miller/P. Novack-Gottshall] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8882: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.09.2000, edited by Uta Merkel