Sakuraguchidani Valley: Late Pliensbachian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Liparoceratidae
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Amaltheus margaritatus
de Montford 1808
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Yamaguchi |
| Coordinates: | 34.2° North, 131.1° East (view map) | ||
| Paleocoordinates: | 46.2° North, 157.1° East (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Early Jurassic |
| Stage: | Pliensbachian | 10 m.y. bin: | Jurassic 2 |
| Key time interval: | Late Pliensbachian | ||
| Age range of interval: | 192.9 - 184.2 m.y. ago |
Stratigraphy
| Geological group: | Toyora | Formation: | Nishinakayama | Member: | Sakuraguchidani |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | mudstone |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 222658 | ||
| Authorizer: | B. Allen | Enterer: | B. Allen |
| Modifier: | B. Allen | ||
| Created: | 2021-10-11 07:36:26 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2021-10-11 07:36:26 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 78334. | K. Nakada, M. Goto, C. Meister and A. Matsuoka. 2021. The late Pliensbachian (Early Jurassic) ammonoid Amaltheus in Japan: systematics and biostratigraphic and paleobiogeographic significance. Journal of Paleontology 95(5):1004-1021 [B. Allen/B. Allen] |