Where: Niigata, Japan (37.0° N, 137.8° E: paleocoordinates 46.5° N, 145.4° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Otakidani Formation (Kuruma Group), Late/Upper Toarcian (180.1 - 175.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology: marine; sandy shale and conglomerate
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 40311: authorized by Martin Aberhan, entered by Sabine Nürnberg on 22.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Geratrigonia kurumensis Kobayashi 1954 clam |