Locality KB, Todai area: Late Aptian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Oppeliidae
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Aconeceras (Aconeceras) sp.
Hyatt 1903
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Nagano |
| Coordinates: | 35.8° North, 138.1° East (view map) | ||
| Paleocoordinates: | 43.3° North, 149.0° East (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| Key time interval: | Late Aptian | Ammonoid zone: | Aconeceras (A.) sp. |
| Age range of interval: | 119.57 - 113.2 m.y. ago |
Stratigraphy
| Formation: | Todai | ||||
| Local section: | Locality KB | Local bed: | 4.7 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Upper Member | |||||
Lithology and environment
| Primary lithology: | lithified "shale" |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Repository: Hase Fossil Museum in Ina City, Nagano Prefecture (TKB) | |
Metadata
| Database number: | 220841 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | G. Palazzo | Research group: | marine invertebrate |
| Created: | 2021-06-17 22:41:11 | Last modified: | 2026-09-09 18:19:25 |
| Access level: | the public | Released: | 2021-06-17 22:41:11 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 77187. | M. Matsukawa. 2021. Aptian (Lower Cretaceous) ammonite fauna of the Todai Formation, Nagano Prefecture, Japan. Cretaceous Research 126(104771) [M. Clapham/M. Clapham] |