Akasaka (Asato collection): Roadian, Japan
collected by K. Asato 2015, 2016

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Alatoconchidae
Shikamaia akasakaensis Ozaki 1968
see common names

Geography
Country:Japan
Coordinates: 35.4° North, 136.6° East (view map)
Paleocoordinates:19.7° North, 107.3° East
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:273.01000 - 266.90000 m.y. ago
Stratigraphy
Formation:Akasaka
Stratigraphic resolution:group of beds
Stratigraphy comments: Lower Member. Probably from the third Shikamaia bed (as recognized by Kobayashi 2011) from the bottom of the Cancellina nipponica zone.
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:K. Asato Collection dates:2015, 2016
Collection method comments: Repository: National Museum of Nature and Science, Tsukuba
Metadata
Database number:189291
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2017-10-09 22:52:16 Last modified:2017-10-09 22:52:16
Access level:the public Released:2017-10-09 22:52:16
Creative Commons license:CC BY
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]