Where: Iburi, Japan (42.8° N, 142.5° E: paleocoordinates 52.2° N, 136.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Middle Yezo Group, Cenomanian (100.5 - 93.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; gray 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 39654: authorized by Martin Aberhan, entered by Sabine Nürnberg on 02.06.2004

Creative Commons license: CC BY (attribution)