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

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Campanian (83.5 - 70.6 Ma)

• The lithology and the mode of shell preservation, as well as other fossils, suggest its derivation from the upper part of unit C.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, calcareous siltstone

Size class: macrofossils

Collected in 1980

• Repository: MNH (Natural History Collection of Northern Hoikkaido, c/o T. Miyauchi, Midori 6-Chome, Wakkanai)

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 165937: authorized by Matthew Clapham, entered by Matthew Clapham on 31.01.2015

Creative Commons license: CC BY (attribution)