Where: Yamaguchi, Japan (34.2° N, 131.0° E: paleocoordinates 42.0° N, 135.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Utano Formation (Toyora Group), Bathonian (168.3 - 166.1 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; shale and sandstone

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 40563: authorized by Martin Aberhan, entered by Sabine Nürnberg on 25.06.2004

Creative Commons license: CC BY (attribution)