Tetori River, Shiramine Village: Aptian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Neochoristodera indet.
Evans and Hecht 1993
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1 individual | |||||||||
| SBEI 1854 is a nearly complete right premaxilla | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Ishikawa | County: | Shiramine |
| Coordinates: | 36.2° North, 136.6° East (view map) | ||||
| Paleocoordinates: | 44.0° North, 146.8° East (Wright 2013) | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Aptian | 10 m.y. bin: | Cretaceous 3 |
| Key time interval: | Aptian | ||
| Age range of interval: | 121.4 - 113.2 m.y. ago |
Stratigraphy
| Geological group: | Tetori | Formation: | Akaiwa | Member: | Lower |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Lower or 'alternation' member, Akaiwa Formation, Tetori Group...probably late Neocomian [~Hauterivian]
Based on zircon U-Pb dating, the zircon grains from the tuff of the Akaiwa Formation of the Tetori Group in the Shiramine area which are correlated with the Nochino Formation has an age of 121.2 ± 1.1 Ma (Sakai et al., 2019). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Includes fossils? | Y |
| Environment: | mire/swamp |
| Geology comments: Three facies were identified at this locality: Facies I, a carbonaceous swamp; Facies II, a shallow lake; and Facies III, a vegetated swamp | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | Hakusan | ||
| Database number: | 155846 | ||
| Authorizer: | P. Mannion | Enterer: | J. Tennant |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2014-05-03 04:57:23 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2014-05-03 04:57:23 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 51001. | R. Matsumoto, M. Manabe, and S. E. Evans. 2014. The first record of a long-snouted chrositodere (Reptilia, Diapsida) from the Early Cretaceous of Isihikawa Prefecture, Japan. Historical Biology 27(5):583-594 [P. Mannion/J. Tennant/P. Mannion] |