Where: Ishikari, Japan (43.5° N, 142.0° E: paleocoordinates 50.9° N, 143.5° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Orbitolina Limestone Formation (Lower Yezo Group), Aptian (125.0 - 113.0 Ma)

• "Orbitolina Limestone"

• formation-level stratigraphic resolution

Environment/lithology: marine; limestone

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40549: authorized by Martin Aberhan, entered by Sabine Nürnberg on 25.06.2004

Creative Commons license: CC BY (attribution)