Shimogahora: Burdigalian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Osteichthyes
- Cetacea
- Squalodelphinidae
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| 1 specimen | ||||||||||
| MFM 18190 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Gifu | County: | Ena |
| Coordinates: | 35.4° North, 137.4° East (view map) | ||||
| Paleocoordinates: | 35.3° North, 134.7° East (Wright 2013) |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Burdigalian | ||
| Age range of interval: | 20.45 - 15.98 m.y. ago |
Stratigraphy
| Geological group: | Iwamura | Formation: | Toyama | Member: | Maki |
| Stratigraphy comments: Toyama Formation, Iwamura Group, upper lower Miocene. MFM 18190 was recovered from the Kubohara facies of the Maki Member, Toyama Formation, Iwamura Group. Ito et al. (1999) assigned the Maki Member to the Crucidenticula sawamurae Zone (Barron and Gladenkov, 1995; Yanagisawa and Akiba, 1998) based on diatom biostratigraphy. The age of the Toyama Formation has been estimated to be 17–16Ma (late Burdigalian) by fission track dating (Sasao et al., 2011).
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Lithology and environment
| Primary lithology: | not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 200287 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen | Research group: | vertebrate |
| Created: | 2019-03-26 12:52:25 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2019-03-26 12:52:25 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 29673. | T. Kimura. 2018. First squalodelphinid from the early Miocene of the Pacific realm in the Northern Hemisphere. Journal of Vertebrate Paleontology 38(4):e1493595 [M. Uhen/M. Uhen/M. Uhen] |