Where: Japan (34.3° N, 134.9° E: paleocoordinates 42.5° N, 123.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nostoceras hetonaiense ammonoid zone, Kita-ama Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified mudstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: Osaka Museum of Natural History

Primary reference: Y. Morozumi. 1985. Late Cretaceous (Campanian and Maastrichtian) ammonites from Awaji Island, southwest Japan. Bulletin of the Osaka Museum of Natural History 39:1-58 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176810: authorized by Matthew Clapham, entered by Matthew Clapham on 03.03.2016

Creative Commons license: CC BY (attribution)