Tsikapunnai (= Chikabunnai), a left tributary of the Abeshinai River, Saku area: Santonian - Campanian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Pachydiscidae
Pachydiscus teshioensis n. sp. Jimbo 1874
Tanabe and Shigeta 2002
see common names

Geography
Country:Japan State/province:Teshio
Coordinates: 44.7° North, 142.0° East (view map)
Paleocoordinates:52.9° North, 131.1° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:local area
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Santonian - Campanian 10 m.y. bin: Cretaceous 6 - Cretaceous 7
Key time interval: Santonian - Campanian Ammonoid zone:  Anapachydiscus naumanni
Age range of interval: 85.7 - 72.2 m.y. ago
Stratigraphy
Geological group:Upper Yezo Formation:Upper Haborogawa
Stratigraphic resolution:formation
Stratigraphy comments: PJW: Given the age & area, this should be the Upper Haborogawa formation.
Lithology and environment
Primary lithology: mudstone
Lithology description: containing calcareous nodules
Environment:marine indet.
Taphonomy
Modes of preservation:cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:234037
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2024-03-13 21:10:28 Last modified:2025-02-22 15:12:02
Access level:the public Released:2024-03-13 21:10:28
Creative Commons license:CC0
Reference information

Primary reference:
17983. 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]

Secondary references:

87849 K. Tanabe and Y. Shigeta. 2002. Cretaceous Ammonoidea. In N. Ikeya, H. Hirano, K. Ogasawara (eds.), The database of Japanese fossil type specimens described during the 20th Century (Part 2) 40:236-298 [P. Wagner/P. Wagner/P. Wagner]