Where: Japan (39.0° N, 141.6° E: paleocoordinates 21.9° N, 112.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Shigejizawa Member (Kanokura Formation), Roadian (272.3 - 268.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy shale

Size class: macrofossils

Preservation: mold/impression

Primary reference: M. Murata. 1964. Some Middle Permian Aviculopectinidae from the Kitakami Massif, northeast Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 54:215-233 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 113874: authorized by Matthew Clapham, entered by Matthew Clapham on 06.08.2011

Creative Commons license: CC BY (attribution)