Locality 7030, Tokawa: Early Aptian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Nautilida
- Cenoceratidae
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Heminautilus tyosiensis
(Yabe and Osaki 1963)
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 35.7° North, 140.9° East (view map) |
| Paleocoordinates: | 45.8° North, 149.8° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Barremian | ||
| Key time interval: | Early Aptian | Ammonoid zone: | Dufrenoyia furcata |
| Age range of interval: | 121.4 - 119.57 m.y. ago |
Stratigraphy
| Formation: | Inubouzaki | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Specimens illustrated by OBATA et al. (1975) come from the Kimihagama Formation [likely equivalent to the major part of the Kimihagama, Inubouzaki and Toriakeura formations in the sense of OBATA & MATSUKAWA (2009)], above the Ashikajima Formation [with Dufrenoyia aff. dufrenoyi (ORBIGNY, 1841)] and below the Nagasakihana Formation [with Chelo-niceras meyendorffi (ORBIGNY, 1845)]; these specimens can thus be attributed also to the top of the Early Aptian (= Dufrenoyia furcata Zone). | |||||
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: | taxonomic analysis |
| Collection method comments: Repository: National Science Museum, Tokyo | |
Metadata
| Database number: | 181262 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2016-08-30 23:05:43 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2016-08-30 23:05:43 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 60020. | C. Baudouin, G. Delanoy, J. A. Moreno-Bedmar, A. Pictet, J. Vermeulen, G. Conte, R. Gonnet, P. Boselli, and M. Boselli. 2016. Revision of the Early Cretaceous genera Heminautilus Spath, 1927, and Josanautilus Martínez & Grauges, 2006 (Nautilida, Cenoceratidae). Carnets de Géologie 16(5):61-212 [M. Clapham/M. Clapham] |