Also known as NSM-PCL11-73-1; Loc. 5 in Matsumoto and Morozumi 1980

Where: Japan (34.4° N, 135.3° E: paleocoordinates 42.6° N, 124.3° E)

• outcrop-level geographic resolution

When: Nostoceras hetonaiense zone, Azenotani Mudstone Member (Mutsuo Formation), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; sandy siltstone

Primary reference: T. Kase. 1990. Late Cretaceous gastropods from the Izumi Group of southwest Japan. Journal of Paleontology 64(4):563-578 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 4890: authorized by John Alroy, entered by John Alroy on 29.08.1999

Creative Commons license: CC BY (attribution)