Pn1032F, Pombetsu River, Mikasa area: Late Albian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Ammonitida
- Tetragonitidae
|
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| Parajaubertella aff. kawakitana in Futakami 1996 (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 43.3° North, 142.0° East (view map) |
| Paleocoordinates: | 48.9° North, 150.3° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Albian | 10 m.y. bin: | Cretaceous 4 |
| Key time interval: | Late Albian | ||
| Age range of interval: | 106.3 - 100.5 m.y. ago |
Stratigraphy
| Geological group: | Yezo | Formation: | Hikagenosawa | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Although the exact horizon is uncertain, judging from the locality, it probably came from the mudstone of the lower to middle parts of the Hikagenosawa Formation. In the Mikasa area this formation contains Oxytropidoceras (Adkinsites) sp. in the lowest part and Cantabrigites imaii (Yabe and Shimizu, 1931) in the main part (Matsumoto, 1965; Futakami et al., 2008). The former occurs in the Middle to Upper Albian (Wright et al., 1996), and the latter is restricted to the Upper Albian (Toshimitsu and Hirano, 2000). Therefore, the holotype’s source is likely the Upper Albian. | |||||
Lithology and environment
| Primary lithology: | concretionary lithified mudstone |
| Lithology description: Cold-seep carbonate | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Repository: National Museum of Nature and Science, Tsukuba | |
Metadata
| Database number: | 276129 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2025-12-10 16:35:42 | Last modified: | 2025-12-10 16:35:42 |
| Access level: | the public | Released: | 0000-00-00 00:00:00 |
| Creative Commons license: |
Reference information
Primary reference:
| 93581. | Y. Shigeta, M. Futakami, and R. Hoffmann. 2012. Two new ammonoid genera of the subfamily Gabbioceratinae from the Upper Albian (Lower Cretaceous) of Hokkaido, Japan. Paleontological Research 16:208-218 [M. Clapham/M. Clapham] |