Asahi Area, Negoya Formation, Honshu (Jurassic of Japan)

Where: Toyama, Japan (36.8° N, 137.3° E: paleocoordinates 48.0° N, 147.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Negoya Formation (Kuruma Group), Pliensbachian (190.8 - 182.7 Ma)

• Negoya and Tsuchizawa Formations

• formation-level stratigraphic resolution

Environment/lithology: marine; sandstone and shale

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 39570: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 31.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Mytilida - Mytilidae
 Cardiida - Neomiodontidae
Crenotrapezium kurumense clam
subsp. kurumense