Where: Japan (35.5° N, 135.5° E: paleocoordinates 32.2° N, 111.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Maizuru Formation, Changhsingian (254.2 - 252.2 Ma)

• Upper horizon of Middle Maizuru Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, black shale

Size class: macrofossils

Preservation: mold/impression

Collected by K. Nakazawa

Primary reference: K. Nakazawa and N.D. Newell. 1968. Permian bivalves of Japan. Memoirs of the Faculty of Science, Kyoto University, Series of Geology and Mineralogy 35(1):1-108 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 114490: authorized by Matthew Clapham, entered by Matthew Clapham on 15.08.2011

Creative Commons license: CC BY (attribution)