IK1038, Ikushunbetsu River, Mikasa City (Cretaceous of Japan)

Where: Japan (43.2° N, 142.0° E: paleocoordinates 51.0° N, 134.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Euomphaloceras septemseriatum ammonoid zone, Mikasa Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Mikasa Formation, which overlies pre-Cenomanian Cretaceous deposits. AGE: Early Turonian, based on ammonite biostratigraphy. STRATIGRAPHIC POSITION: From near base of local regional section

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

• ENVIRONMENT: Inshore to nearshore and nearshore to offshore or deeper waters.
• GENERAL LITHOLOGY: Sandstone. 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 86999: 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
Scaphites aff. obliquus, "Scaphites puerculus" = Yezoites puerculus, "Scaphites planus" = Yezoites puerculus
Scaphites aff. obliquus Sowerby 1813 ammonite
"Scaphites puerculus" = Yezoites puerculus Jimbo 1894 ammonite
"Scaphites planus" = Yezoites puerculus Jimbo 1894 ammonite