Akan-cho: Langhian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Lamniformes
- Lamnidae
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Chondrichthyes
- Lamniformes
- Otodontidae
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Osteichthyes
- Carnivora
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| Kohno 2002 | 1 specimen | ||||||
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Osteichthyes
- Carnivora
- Odobenidae
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| Kohno 2002 | 1 specimen | ||||||
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Osteichthyes
- Carnivora
- Desmatophocidae
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| Kohno 2002 | 9 specimens | ||||||
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Osteichthyes
- Perissodactyla
- Paleoparadoxiidae
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Osteichthyes
- Perissodactyla
- Desmostylidae
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Osteichthyes
- Cetacea
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Hokkaido |
| Coordinates: | 43.2° North, 144.0° East (view map) | ||
| Paleocoordinates: | 43.2° North, 141.0° East (Wright 2013) | ||
| Basis of coordinate: | estimated from map |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Langhian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Langhian | ||
| Age range of interval: | 15.98 - 13.82 m.y. ago |
Stratigraphy
| Formation: | Tonokita | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: 15.9 - 14.9 Ma. Age after Matsui and Kawabe (2015) | |||||
Lithology and environment
| Primary lithology: | mudstone |
| Includes fossils? | Y |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
| Taxonomic list comments:Atsunai-Togeshita fauna | |
Metadata
| Database number: | 55652 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2005-11-02 06:21:52 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2005-11-02 06:21:52 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 15028. | M. Kimura, M. Yahata, H. Sawamura, I. Segawa, A. Suzuki and Y. Muraishi. 1998. The vertebrate fossils and their horizon from Akan-cho, eastern Hokkaido, Japan. Earth Science (Chikyu Kagaku) 52:44-50 [M. Uhen/M. Uhen] |
Secondary references:
| 77034 | N. Kohno. 2002. Pinniped fossils from Akan-cho, Hokkaido. Research report of Akan fossil fauna 17(28) [M. Uhen/M. Uhen] | |
| 76950 | W. Tonomori, S. Kawano, K. Otsua and H. Hayashi. 2021. Report of an allodesmine humerus from Shimane, Japan: summary of Japanese allodesmines. Historical Biology [M. Uhen/M. Uhen] |