Where: Ehime, Japan (33.2° N, 132.6° E: paleocoordinates 42.9° N, 123.4° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Makinoyama Formation (Uwajima Group), Santonian (86.3 - 83.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; mudstone

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 40593: authorized by Martin Aberhan, entered by Sabine Nürnberg on 26.06.2004

Creative Commons license: CC BY (attribution)