IK2710-11, Pombetsu-gonosawa Creek, Mikasa City (Cretaceous of Japan)

Where: Japan (43.3° N, 142.0° E: paleocoordinates 50.3° N, 133.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kashima Formation, Early/Lower Coniacian (89.3 - 85.8 Ma)

• STRATIGRAPHIC RELATIONS: From an unnamed lithostratigraphic unit, given as the Kashima Formation by Tanabe (2022), which overlies the Turonian Mikasa FOrmation. AGE: Early-Middle Coniacian, based on ammonite and inoceramid biostratigraphy. STRATIGRAPHIC POSITION: From near top of local regional section

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, silty 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 86994: 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 (Otoscaphites) klamathensis" = Yezoites pseudoaequalis, Scaphites pseudoequalis
"Otoscaphites (Hyposcaphites) matsumotoi" = Yezoites matsumotoi Tanabe 1977 ammonite
"Otoscaphites (Otoscaphites) klamathensis" = Yezoites pseudoaequalis Yabe 1910 ammonite