Where: Iwate, Japan (39.1° N, 141.7° E: paleocoordinates 47.5° N, 143.7° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Nagaiso Member, Neocomian (145.0 - 125.8 Ma)
• Upper Neocomian
• member-level stratigraphic resolution
Environment/lithology: marine
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 39982: authorized by Martin Aberhan, entered by Sabine Nürnberg on 13.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Ptychomya densicostata Nagao 1934 clam |