Where: Miyagi, Japan (38.9° N, 141.6° E: paleocoordinates 47.4° N, 147.3° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Tsunakizaka Formation (Karakuwa Group), Bajocian (170.3 - 168.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; sandy 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 40035: authorized by Martin Aberhan, entered by Sabine Nürnberg on 16.06.2004

Creative Commons license: CC BY (attribution)