R2638, Obirashibe River, Obira area (Cretaceous of Japan)

Where: Japan (44.1° N, 141.9° E: paleocoordinates 51.1° N, 133.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Inoceramus uwajimensis inoceramid zone, Haborogawa Formation, Early/Lower Coniacian (89.3 - 85.8 Ma)

• STRATIGRAPHIC RELATIONS: From the Haborogawa Formation, which overlies the Turonian Saku Formation. AGE: Early Coniacian, based on ammonite and inoceramid biostratigraphy. STRATIGRAPHIC POSITION: From near top of local regional section

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, tuffaceous siltstone

• ENVIRONMENT: Inshore to nearshore and nearshore to offshore or deeper waters.
• GENERAL LITHOLOGY: Siltstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: COLLECTOR: Tanabe et al. (1977). REPOSITORY: Dept. of Geology, Kyushu University, Japan.

Primary reference: K. Tanabe. 1977. Mid-Cretaceous scaphitid ammonites from Hokkaido. Palaeontological Society of Japan Special Papers 21:11-22 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86990: authorized by Austin Hendy, entered by Austin Hendy on 26.02.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to representative scaphitid ammonites. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications.
Cephalopoda
 Ammonitida - Scaphitidae
"Otoscaphites (Hyposcaphites) matsumotoi" = Yezoites matsumotoi
"Otoscaphites (Hyposcaphites) matsumotoi" = Yezoites matsumotoi Tanabe 1977 ammonite