Akasaka (Kase collection): Roadian, Japan
collected by T. Kase 1980

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Alatoconchidae
see common names

Geography
Country:Japan
Coordinates: 35.4° North, 136.6° East (view map)
Paleocoordinates:8.7° North, 133.4° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Permian Epoch: Guadalupian
Stage: Roadian 10 m.y. bin: Permian 3
Key time interval: Roadian Foram zone:  Cancellina nipponica
Age range of interval: 274.4 - 266.9 m.y. ago
Stratigraphy
Formation:Akasaka
Stratigraphic resolution:group of beds
Stratigraphy comments: Lower Member, but exact horizon unknown as quarry operations have removed the original collecting site.
Lithology and environment
Primary lithology:gray lithified packstone
Lithology description: Light gray wackestone/packstone
Environment:carbonate indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collectors:T. Kase Collection dates:late 1980s
Collection method comments: Repository: National Museum of Nature and Science, Tsukuba
Metadata
Database number:189292
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2017-10-09 22:53:30 Last modified:2025-02-22 15:12:02
Access level:the public Released:2017-10-09 22:53:30
Creative Commons license:CC0
Reference information

Primary reference:
63552. K. Asato, T. Kase, T. Ono, K. Sashida, and S. Agematsu. 2017. Morphology, systematics and paleoecology of Shikamaia, aberrant Permian bivalves (Alatoconchidae: Ambonychioidea) from Japan. Paleontological Research 21:358-379 [M. Clapham/M. Clapham]