Urakawa Area, Upper Yezo Group, Hokkaido (Cretaceous of Japan)

Where: Hidaka, Japan (42.2° N, 142.8° E: paleocoordinates 48.6° N, 133.9° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Upper Yezo Group, Santonian (86.3 - 83.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; mudstone

• containing calcareous nodules

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 40588: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 26.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Lucinida - Lucinidae
Myrtea ezoensis Nagao 1957 clam
 Protobranchia - Nuculanidae
Jupiteria (Ezonuculana) mactraeformis Nagao 1932 pointed nut clam