Hetonai Area, Hakobuchi Group, Hokkaido (Cretaceous of Japan)

Where: Iburi, Japan (42.8° N, 142.2° E: paleocoordinates 46.8° N, 131.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Hakobuchi Group, Maastrichtian (72.1 - 66.0 Ma)

• Upper part of Hakobuchi Group

• formation-level stratigraphic resolution

Environment/lithology: marine; sandstone and fine-grained, sandy siltstone

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 40603: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 26.06.2004, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

 Myalinida - Inoceramidae
 Protobranchia - Solemyidae
 Vanikoroidea - Gigantocapulidae
Gigantocapulus problematicus Nagao and Otatume 1938 snail