Tsikapunnai (= Chikabunnai), a left tributary of the Abeshinai River, Saku area (Cretaceous to of Japan)

Where: Teshio, Japan (44.7° N, 142.0° E: paleocoordinates 49.5° N, 130.7° E)

• coordinate stated in text

• local area-level geographic resolution

When: Anapachydiscus naumanni ammonoid zone, Upper Haborogawa Formation (Upper Yezo Group), Santonian to Santonian (86.3 - 72.1 Ma)

• PJW: Given the age & area, this should be the Upper Haborogawa formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; mudstone

• containing calcareous nodules

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: S. Toshimitsu and H. Hirano. 2000. Database of the Cretaceous ammonoids in Japan - stratigraphic distribution and　bibliography一. Bulletin of the Geological Survey of Japan 51(11):559-613 [A. Miller/A. Hendy/R. Plotnick]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 234037: authorized by Pete Wagner, entered by Pete Wagner on 13.03.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Pachydiscidae
"Pachydiscus teshioensis n. sp." = Eupachydiscus teshioensis
"Pachydiscus teshioensis n. sp." = Eupachydiscus teshioensis Jimbo 1874 ammonite