Shirakaba-no-sawa River: Early Maastrichtian, Japan
collected by Y. Kawashita

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Tetragonitidae
Shigeta and Nishimura 2014
(3 measurements)
(1 measurement)
see common names

Geography
Country:Japan
Coordinates: 42.8° North, 142.1° East (view map)
Paleocoordinates:50.3° North, 128.0° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Maastrichtian 10 m.y. bin: Cretaceous 8
Key time interval: Early Maastrichtian
Age range of interval: 72.2 - 66 m.y. ago
Stratigraphy
Formation:Hakobuchi
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: lithified muddy sandstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:Y. Kawashita
Collection method comments: Repository: National Museum of Nature and Science, Tsukuba
Metadata
Database number:174603
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2015-11-16 23:53:05 Last modified:2025-02-22 15:12:02
Access level:the public Released:2015-11-16 23:53:05
Creative Commons license:CC0
Reference information

Primary reference:
56995. Y. Shigeta and T. Nishimura. 2013. A new species of Gaudryceras (Ammonoidea, Gaudryceratidae) from the lowest Maastrichtian of Hokkaido, Japan and its biostratigraphic implications. Paleontological Research 17:47-57 [M. Clapham/M. Clapham]

Secondary references:

56994 Y. Shigeta and T. Nishimura. 2014. A new species of Anagaudryceras (Ammonoidea, Gaudryceratidae) from the lowest Maastrichtian of Hokkaido, Japan. Paleontological Research 18:176-185 [M. Clapham/M. Clapham]