Where: Japan (34.3° N, 134.7° E: paleocoordinates 42.8° N, 123.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pravitoceras sigmoidale ammonoid zone, Seidan Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, nodular mudstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: Niigata University

Primary reference: K. Yoshino and A. Matsuoka. 2016. Mode of occurrence and taphonomy of the heteromorph ammonite Pravitoceras sigmoidale Yabe from the Upper Cretaceous Izumi Group, Japan. Cretaceous Research 62:74-85 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 176795: authorized by Matthew Clapham, entered by Matthew Clapham on 02.03.2016

Creative Commons license: CC BY (attribution)