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
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 Nürnberg on 26.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Nuculana (Nuculana) sambonsugii pointed nut clam
Jupiteria (Ezonuculana) mactraeformis Nagao 1932 pointed nut clam | |
Myrtea ezoensis Nagao 1957 clam |