Where: Niigata, Japan (36.7° N, 138.0° E: paleocoordinates 48.0° N, 148.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Kuruma Group, Early/Lower Jurassic (201.4 - 174.7 Ma)

• Lower Jurassic, precisely unknown

• formation-level stratigraphic resolution

Environment/lithology: marine; siliciclastic sediments

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 40038: authorized by Martin Aberhan, entered by Sabine Nürnberg on 16.06.2004

Creative Commons license: CC BY (attribution)