Mt. Kinshozan, middle-upper Member, Akasaka (NMNS collection): Wordian - Capitanian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda - Dentaliida - Prodentaliidae
Scaphopoda - Dentaliida - Dentaliidae
see common names

Geography
Country:Japan
Coordinates: 35.4° North, 136.6° East (view map)
Paleocoordinates:3.3° North, 131.2° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Permian Epoch: Guadalupian
Stage: Wordian - Capitanian 10 m.y. bin: Permian 3 - Permian 4
Key time interval: Wordian - Capitanian
Age range of interval: 266.9 - 259.857 m.y. ago
Stratigraphy
Formation:Akasaka
Stratigraphic resolution:group of beds
Stratigraphy comments: All the specimens used in this study are in the collections of three museums and two institutions; no information is available about their stratigraphic level in the Akasaka Limestone. However, they are all associated with a black muddy limestone matrix, and it is reasonably assumed that they were derived from either the middle or upper members.
Lithology and environment
Primary lithology:black lithified "limestone"
Environment:lagoonal/restricted shallow subtidal
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: National Museum of Nature and Science, Tsukuba (NMNS)
Metadata
Database number:220705
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2021-06-13 22:19:54 Last modified:2025-02-22 15:12:02
Access level:the public Released:2021-06-13 22:19:54
Creative Commons license:CC0
Reference information

Primary reference:
77134. K. Asato and T. Kase. 2021. Gigantic scaphopods (Mollusca) from the Permian Akasaka Limestone, central Japan. Journal of Paleontology 95:748-762 [M. Clapham/M. Clapham]