Iriyama: Zanclean, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Osteichthyes
- Carnivora
- Odobenidae
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Protodobenus japonicus n. gen., n. sp.
Horikawa 1995
|
Horikawa 1995 | ||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Niigata |
| Coordinates: | 37.9° North, 138.5° East (view map) | ||
| Paleocoordinates: | 37.8° North, 137.7° East (Wright 2013) | ||
| Basis of coordinate: | stated in text |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Zanclean | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Zanclean | ||
| Age range of interval: | 5.333 - 3.6 m.y. ago |
Stratigraphy
| Formation: | Tamigigawa | Member: | Lower | ||
| Stratigraphy comments: from the D unit (5.0-4.9 Ma) of the lower part (5.25-4.5 Ma); Nishihama Formation? |
Lithology and environment
| Primary lithology: | fine mudstone |
| Includes fossils? | Y |
| Lithology description: fine mud | |
| Environment: | offshore indet. |
Taphonomy
| Modes of preservation: | body,original phosphate |
| Size of fossils: | macrofossils,microfossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 59180 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2006-03-20 13:14:40 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2006-03-20 13:14:40 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 34619. | H. Horikawa, L. G. Barnes, S. Miyazaki and S. Kobayashi. 1992. A primitive odobenine walrus from Pliocene deposits of Japan. International Geological Congress 29:352 [M. Uhen/M. Uhen] |
Secondary references:
| 16918 | H. Horikawa. 1995. A primitive odobenine walrus of Early Pliocene age from Japan. The Island Arc 3:309-328 [M. Uhen/M. Uhen] |