Shirokawa-cho, Higashiuwa, Taho formation: Olenekian, Japan
collected by Dr. T. Koike & Mr. S. Utsunomiya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Chondrichthyes
- Hybodontiformes
- Polyacrodontidae
|
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|
Polyacrodus minimus
Agassiz 1939
|
1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Shikoku Island | County: | Ehime-ken |
| Coordinates: | 33.4° North, 132.8° East (view map) | ||||
| Paleocoordinates: | 3.6° North, 130.0° East (Wright 2013) |
Time
| Period: | Triassic | Epoch: | Early Triassic |
| Stage: | Olenekian | 10 m.y. bin: | Triassic 1 |
| Key time interval: | Olenekian | ||
| Age range of interval: | 250.8 - 247 m.y. ago |
Stratigraphy
| Formation: | Taho |
Lithology and environment
| Primary lithology: | gray "limestone" |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Dr. T. Koike & Mr. S. Utsunomiya |
Metadata
| Database number: | 133504 | ||
| Authorizer: | M. Clapham | Enterer: | P. Vazquez | Research group: | vertebrate |
| Created: | 2012-09-14 08:07:01 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2012-09-14 08:07:01 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 42990. | M. Goto. 1994. Palaeozoic and early Mesozoic fish faunas of the Japanese Islands. The Island Arc 3(1994):247-254 [M. Clapham/P. Vazquez] |