Where: Iwate, Japan (40.0° N, 141.8° E: paleocoordinates 54.2° N, 138.5° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Aketo Formation (Miyako Group), Early/Lower Albian (112.0 - 109.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; calcareous 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 40555: authorized by Martin Aberhan, entered by Sabine Nürnberg on 25.06.2004

Creative Commons license: CC BY (attribution)