Yoh Iron Bridge: Tortonian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Lamniformes
- Otodontidae
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Carcharodon megalodon
(Agassiz 1835)
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recombined as Otodus megalodon | |||||||
Mammalia
- Cetacea
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Cetacea indet.
Brisson 1762
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1 specimen | ||||||
Mammalia
- Sirenia
- Dugongidae
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Dusisiren dewana n. sp.
Takahashi et al. 1986
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1 specimen | ||||||
see common names |
Geography
Country: | Japan | State/province: | Yamagata | County: | Nishimurayama |
Coordinates: | 38.3° North, 140.2° East (view map) | ||||
Paleocoordinates: | 39.9° North, 138.4° East | ||||
Basis of coordinate: | stated in text |
Time
Period: | Neogene | Epoch: | Miocene |
Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
Key time interval: | Tortonian | ||
Age range of interval: | 11.62000 - 7.24600 m.y. ago |
Stratigraphy
Formation: | Hongo | Member: | Hashigami Sandstone | ||
Stratigraphy comments: Denticulopsis katayamae diatom zone, 9.0 to 10.4 Ma, late Miocene |
Lithology and environment
Primary lithology: | "cross stratification",medium sandstone |
Includes fossils? | Y |
Lithology description: mdium to-very-coarse-grained sandstone exhibiting large scale trough cross stratification | |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body,original phosphate |
Size of fossils: | macrofossils |
Articulated whole bodies: | all |
Collection methods and comments
Reason for describing collection: | general faunal/floral analysis |
Metadata
Also known as: | Yoh Ohe | ||
Database number: | 71537 | ||
Authorizer: | M. Uhen | Enterer: | M. Uhen |
Modifier: | M. Uhen | Research group: | vertebrate |
Created: | 2007-04-27 14:42:59 | Last modified: | 2019-10-01 22:16:21 |
Access level: | the public | Released: | 2007-04-27 14:42:59 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
24176. | S. Takahashi, D. P. Domning, and T. Saito. 1986. Dusisiren dewana, n. sp. (Mammalia: Sirenia), a new ancestor of Stellers sea cow from the upper Miocene of Yamagata prefecture, northeastern Japan. Transactions and Proceedings of the Palaeontological Society of Japan N. S. 141:296-321 [M. Uhen/M. Uhen] |
Secondary references:
70357 | H. Furusawa. 2005. Evolution of the North Pacific Sirenia (Hydrodamalinae) and their paleoenvironment. Fossils 77:29-33 [M. Uhen/M. Uhen] |