Where: Japan (35.4° N, 137.8° E: paleocoordinates 39.0° N, 135.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Arakida Formation (Tomikusa Group), Burdigalian (20.4 - 16.0 Ma)

• The geologic age of the upper part of Tomikusa Group (i.e., Arakida and Awano Formations) has been estimated as ca 18.1-17.2 Ma by magnetostratigraphy.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; fine-grained, tuffaceous, gray, white sandstone

Size class: macrofossils

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

Primary reference: R. Imaizumi. 1957. Three new Miocene species of Callianassa from Nagano Prefecture. Transactions and Proceedings of the Paleontological Society of Japan, N.S 27:81-85 [C. Schweitzer/L. Baltzly/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 169968: authorized by Carrie Schweitzer, entered by Lerin Baltzly on 07.06.2015, edited by Mark Uhen

Creative Commons license: CC BY (attribution)