Ykw-01, Koyasawa River: Messinian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Coleoptera - Chrysomelidae
2 specimens
(1 measurement)
8 specimens
OMNH TI-130 and 7 paratypes (1 measurement)
see common names

Geography
Country:Japan State/province:Yamagata
Coordinates: 37.9° North, 140.0° East (view map)
Paleocoordinates:37.7° North, 138.7° East (Wright 2013)
Basis of coordinate:estimated from map
Altitude:360 meters
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
Stage: Messinian 10 m.y. bin: Cenozoic 6
Key time interval: Messinian
Age range of interval: 7.246 - 5.333 m.y. ago
Stratigraphy
Formation:Takamine
Stratigraphic resolution:bed
Stratigraphy comments: Lower Takamine Formation, uppermost Miocene (younger than 5.9 +/1 1.2 Ma).
Lithology and environment
Primary lithology: poorly lithified carbonaceous siltstone
Lithology description: Peaty silt
Environment:mire/swamp Tectonic setting:intramontane basin
Geology comments: Formation composed of meandering river and marsh deposits (peaty silt presumably reflects overbank environment). Intra-arc basin.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: Osaka Museum of Natural History (OMNH)
Metadata
Database number:156204
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:paleoentomology
Created:2014-05-12 13:35:18 Last modified:2025-02-22 15:12:02
Access level:the public Released:2014-05-12 13:35:18
Creative Commons license:CC0
Reference information

Primary reference:
51153. M. Hayashi. 2001. Neogene donaciine fossils from Tamaniwa district, Yamagata Prefecture, Japan, with description of a new species (Coleoptera: Chrysomelidae: Donaciinae). Bulletin of the Osaka Museum of Natural History 55:7-14 [M. Clapham/M. Clapham]