Akan-cho: Langhian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Lamniformes
- Lamnidae
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Isurus hastalis
(Agassiz 1838)
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recombined as Carcharodon hastalis | |||||||
Chondrichthyes
- Lamniformes
- Otodontidae
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Carcharodon megalodon
(Agassiz 1835)
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recombined as Otodus megalodon | |||||||
Mammalia
- Perissodactyla
- Paleoparadoxiidae
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Paleoparadoxia sp.
Reinhart 1959
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Mammalia
- Perissodactyla
- Desmostylidae
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Desmostylus sp.
Marsh 1888
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Mammalia
- Cetacea
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Cetacea indet.
Brisson 1762
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Mammalia
- Carnivora
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Pinnipedia indet.
(Illiger 1811)
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Kohno 2002 | 1 specimen | |||||
Mammalia
- Carnivora
- Odobenidae
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Odobenidae indet.
(Allen 1880)
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Kohno 2002 | 1 specimen | |||||
Mammalia
- Carnivora
- Desmatophocidae
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Allodesminae indet.
(Kellogg 1931)
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Kohno 2002 | 9 specimens | |||||
see common names |
Geography
Country: | Japan | State/province: | Hokkaido |
Coordinates: | 43.2° North, 144.0° East (view map) | ||
Paleocoordinates: | 43.8° North, 142.3° East | ||
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: | 15.97000 - 13.82000 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: | 2021-06-01 14:37:43 |
Access level: | the public | Released: | 2005-11-02 06:21:52 |
Creative Commons license: | CC BY |
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] |