Locality 18 (Arakida Formation): Early/Lower Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Llquidambar formosana
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Chondrichthyes
- Lamniformes
- Otodontidae
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Carcharodon megalodon
(Agassiz 1835)
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| recombined as Otodus megalodon | ||||||||||
| Specimen presents lateral cusplets. Based on this characteristic and the early Miocene age of the deposits, this species is more likely to be C. chubutensis and not C. megalodon (see Pimiento et al. 2013) | ||||||||||
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Chondrichthyes
- Lamniformes
- Lamnidae
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Isurus hastalis
(Agassiz 1838)
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| recombined as Carcharodon hastalis | ||||||||||
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Bivalvia
- Cardiida
- Trapezidae
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Trapezium modilaeformis
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma acutilineata
(Conrad 1849)
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Rhynchonellata
- Terebratulida
- Cancellothyrididae
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Terebratulina indet.
d'Orbigny 1847
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Malacostraca
- Decapoda
- Callianassidae
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Callianassa inornata
Nagao and Huzioka 1938
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| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Nagano | County: | Yamadakawachi |
| Coordinates: | 35.8° North, 137.9° East (view map) | ||||
| Paleocoordinates: | 39.9° North, 135.3° East | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene | ||
| Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Lithology and environment
| Primary lithology: | lithified mudstone |
| Includes fossils? | Y |
| Lithology description: Mudstone | |
| Environment: | deep-water indet. |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 159664 | ||
| Authorizer: | C. Jaramillo | Enterer: | C. Pimiento |
| Modifier: | C. Pimiento | ||
| Created: | 2014-08-06 03:32:00 | Last modified: | 2014-10-02 13:27:47 |
| Access level: | authorizer only | Released: | 2014-08-06 03:32:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 52152. | T. Shikama. 1954. On the Tertiary Formations of Tomikusa in South Nagano Prefecture Article. Science reports of the Yokohama National University 2(3):71-108 [C. Jaramillo/C. Pimiento] |
Secondary references:
| 52101 | C. Pimiento, G. González-Barba, A.J.W. Hendy, C. Jaramillo, B. J. MacFadden, C. Montes, S. C. Suarez and M. Shippritt. 2013. Early Miocene chondrichthyans from the Culebra Formation Panama A window into marine vertebrate faunas before closure the Central American Seaway. Journal of South American Earth Sciences 42:159-170 [C. Jaramillo/C. Pimiento/C. Pimiento] |