Where: Japan (45.5° N, 141.9° E: paleocoordinates 50.1° N, 129.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Metaplacenticeras subtilistriatum ammonoid zone, Ohmisaki Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• Substage K6a3, approximately Upper Campanian. The latter can be called the Zone of Metaplacenticeras subtilistriatum.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, bioturbated, fine-grained, nodular, silty sandstone

Size class: macrofossils

Collected by T. Miyauchi

• Repository: MNH (Natural History Collection of Northern Hokkaido, c/o T. Miyauchi, Midori 6-Chome, Wakkanai) to be transferred to GK (Geological Collections, Kyushu University, Fukuoka).

Primary reference: T. Matsumoto and T. Miyauchi. 1983. Cretaceous Nautiloids from Hokkaido-III Part 3. Some Nautiloids from the Campanian of Soya, Northern Hokkaido. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 132:220-229 [M. Clapham/K. Okamoto/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 165592: authorized by Matthew Clapham, entered by Kristina Okamoto on 23.01.2015

Creative Commons license: CC BY (attribution)