Where: Japan (43.2° N, 142.0° E: paleocoordinates 52.6° N, 136.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mantelliceras japonicum ammonoid zone, IIb Member (Mikasa Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, nodular, silty sandstone

Size class: macrofossils

Preservation: cast, mold/impression

Collected by T. Takahashi

• Repository: collection of Takemi Takahashi

Primary reference: T. Matsumoto and T. Takahashi. 1982. A new nautiloid species from the Cretaceous of Hokkaido. Proceedings of the Japan Academy, Series B 58:295-298 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 166256: authorized by Matthew Clapham, entered by Matthew Clapham on 06.02.2015

Creative Commons license: CC BY (attribution)