Where: Japan (43.3° N, 142.0° E: paleocoordinates 50.3° N, 133.7° E)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Inoceramus uwajimensis inoceramid zone, Yezo Group, Late/Upper Coniacian (89.3 - 85.8 Ma)

• Probably derived from the Member U2, the lower part of the Upper Yezo Group. In the same nodule Scaphites pseudoequalis and I. cf. uwajimensis were contained abundantly. Thus, the age is probably early to middle (?) Coniacian. PJW: Inoceramus uwajimensis (= Inoceramus undabundus) zone is equivalent to the Inoceramus stantoni elsewhere, which is Late Coniacian.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, nodular siliciclastic sediments

Size class: macrofossils

Collected by M. Futakami

• Repository: National Science Museum, Tokyo

Primary reference: M. Futakami. 1991. Coniacian collignoniceratid ammonites from Hokkaido. Journal of Kawamura Gakuen Woman's University 2:257-275 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 181022: authorized by Matthew Clapham, entered by Matthew Clapham on 13.08.2016

Creative Commons license: CC BY (attribution)