Okumuri: Early Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Malacostraca
- Decapoda
- Callianopsidae
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Hokkaido | County: | Iburi |
| Coordinates: | 42.8° North, 141.4° East (view map) | ||||
| Paleocoordinates: | 43.1° North, 137.7° East (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early Miocene | ||
| Age range of interval: | 23.04 - 15.98 m.y. ago |
Stratigraphy
| Formation: | Poronai Series |
Lithology and environment
| Primary lithology: | marl |
| Lithology description: Numerous specimens of Callianassa chelae are met with in the Poronai Series (Lower Neogene) of Hokkaido, especially abundant in the Ishikari coal-field. They are almost aiways found in marly nodules and usually represented by manus, very often isolated but rarely in assoeiation with carpi and other joints. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body,concretion |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 235794 | ||
| Authorizer: | M. Clapham | Enterer: | J. Fearon |
| Created: | 2024-08-01 21:58:09 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2024-08-01 21:58:09 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 89121. | T. Nagao. 1932. Two Tertiary and One Cretaceous Crustacea from Hokkaidô, Japan. Journal of the Faculty of Science, Hokkaido Imperial University. Ser. 4, Geology and mineralogy, 2(1), 15-22 2(1):15-22 [M. Clapham/H. Shin/H. Shin] |