Where: Yamaguchi, Japan (34.2° N, 131.2° E: paleocoordinates 41.1° N, 109.9° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Atsu Group, Ladinian (242.0 - 237.0 Ma)

• Upper part of Atsu Group, Upper Ladinian

• formation-level stratigraphic resolution

Environment/lithology: marine; black 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 40174: authorized by Martin Aberhan, entered by Sabine Nürnberg on 19.06.2004

Creative Commons license: CC BY (attribution)