Where: Japan (45.1° N, 141.8° E: paleocoordinates 45.5° N, 140.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Wakkanai Formation, Tortonian (11.6 - 7.2 Ma)

• Wakkanai Formation extends from latest Middle Miocene Denticulopsis praedimorpha diatom zone through the Late Miocene Thalassionema schraderi diatom zone (Shibata and Tanai, 1982; Fukusawa, 1985).

• group of beds-level stratigraphic resolution

Environment/lithology: submarine fan; lithified, cherty/siliceous mudstone

Size class: macrofossils

Collection methods: Repository: Institute of Geology and Paleontology, Tohoku University

Primary reference: R. Imaizumi. 1952. A Miocene crab, Hyas tsuchidai n. sp. from the Wakkanai Formation of Teshio Province, Hokkaido. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 5:179-183 [C. Schweitzer/L. Baltzly/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 169962: authorized by Carrie Schweitzer, entered by Lerin Baltzly on 06.06.2015

Creative Commons license: CC BY (attribution)