Where: Wakayama, Japan (34.0° N, 135.2° E: paleocoordinates 41.8° N, 137.3° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Yuasa Formation, Neocomian (145.0 - 125.8 Ma)

• Lower Neocomian

• formation-level stratigraphic resolution

Environment/lithology: marine

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 40658: authorized by Martin Aberhan, entered by Sabine Nürnberg on 26.06.2004

Creative Commons license: CC BY (attribution)