Where: Japan (42.2° N, 142.8° E: paleocoordinates 47.0° N, 132.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Metaplacenticeras subtilistriatum ammonoid zone, Chinomigawa Formation, Middle Campanian (83.5 - 70.6 Ma)

• Unit U4

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy mudstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: National Museum of Nature and Science, Tsukuba (NMNS)

Primary reference: Y. Shigeta, M. Izukura, T. Nishimura and Y. Tsutsumi. 2016. Middle and late Campanian (Late Cretaceous) ammonoids from the Urakawa area, Hokkaido, northern Japan. Paleontological Research 20:322-366 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 181920: authorized by Matthew Clapham, entered by Matthew Clapham on 08.10.2016

Creative Commons license: CC BY (attribution)