Where: Nagano, Japan (36.0° N, 138.7° E: paleocoordinates 43.4° N, 141.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Kappazaka Formation (Torinosu Group), Late/Upper Jurassic (161.5 - 145.0 Ma)

• Upper Jurassic (precisely unknown)

• formation-level stratigraphic resolution

Environment/lithology:

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 40172: authorized by Martin Aberhan, entered by Sabine Nürnberg on 19.06.2004

Creative Commons license: CC BY (attribution)