Kabura River: Tortonian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Osteichthyes
- Cetacea
|
|||||||
|
Joumocetus shimizui n. gen., n. sp.
Kimura and Hasegawa 2010
|
1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Gunma | County: | Takasaki |
| Coordinates: | 36.3° North, 139.0° East (view map) | ||||
| Paleocoordinates: | 35.9° North, 137.2° East (Wright 2013) | ||||
| 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: | 11.63 - 7.246 m.y. ago | ||
| Age estimate: | 11.3 to 11.0 Ma (other) |
Stratigraphy
| Geological group: | Annaka | Formation: | Haraichi | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: earliest late Miocene
The Haraichi Formation is bracketed by the underlying Baba and the overlying Kamikoizawa tuffs [140]. 40Ar/39Ar dating places the Baba Tuff at 11.3 Ma [141]. The Kamikoizawa Tuff has not yet been dated directly, but an earliest late Tortonian age (less than 11.0 Ma) has been suggested on the basis of sedimentation rates [142]. (Marx & Fordyce, 2015) | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | deep-water indet. |
| Geology comments: upper bathyal, benthic | |
Taphonomy
| Modes of preservation: | body,original phosphate |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Also known as: | Yoshii | ||
| Database number: | 97324 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2010-07-23 13:43:21 | Last modified: | 2025-11-11 07:43:42 |
| Access level: | database members | Released: | 2010-10-23 13:43:21 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 33200. | T. Kimura and Y. Hasegawa. 2010. A new baleen whale (Mysticeti: Cetotheriidae) from the earliest late Miocene of Japan and a reconsideration of the phylogeny of cetotheres. Journal of Vertebrate Paleontology 30(2):577-591 [M. Uhen/M. Uhen] |
Secondary references:
| 55050 | F. G. Marx and R. E. Fordyce. 2015. Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity. Royal Society Open Science 2:140434 [M. Uhen/M. Uhen] |