Where: Gumma, Japan (36.3° N, 138.7° E: paleocoordinates 44.4° N, 140.8° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Ishido Formation, Neocomian (145.0 - 130.0 Ma)
• Upper Neocomian
• formation-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 40488: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Nuculana sanchuensis pointed nut clam | |
Palaeonucula ishidoensis nut clam | |
Amygdalum ishidoense mussel | |
Rastellum (Arctostrea) carinatum Lamarck 1806 oyster | |
Gervillaria haradae oyster | |
Pinna (Pinna) cf. robinaldina d'Orbigny 1844 oyster | |
Limatula ishidoensis file clam | |
Neithea (Neithella) notabilis Münster 1833 scallop | |
Entolium sanchuense scallop | |
Panopea (Myopsis) plicata Sowerby 1829 clam | |
? Laevicardium ishidoense cockle | |