Shuparo River near Titose-cho, Yubari City: Santonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes - Synechodontiformes - Palaeospinacidae
Kaneko 2024
Chondrichthyes - Heterodontiformes - Heterodontidae
Kaneko and Fujimoto 2022
Chondrichthyes - Orectolobiformes - Orectolobidae
see common names

Geography
Country:Japan
Coordinates: 43.1° North, 142.1° East (view map)
Paleocoordinates:51.3° North, 136.9° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Santonian 10 m.y. bin: Cretaceous 6
Key time interval: Santonian
Age range of interval: 85.7 - 83.6 m.y. ago
Stratigraphy
Formation:Kashima
Stratigraphic resolution:bed
Stratigraphy comments: Dense layer about 20 cm thick in a medium-grained sandstone bed with a thickness of about 1 meter. Presence of Inoceramus amakusensis in rocks where the fossilized shark teeth were collected indicates a Santonian age.
Lithology and environment
Primary lithology:glauconitic,shelly/skeletal lithified sandstone
Environment:submarine fan
Geology comments: Turbiditic sandstone in upper bathyal environment
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Spatial resolution:allochthonous
Collection methods and comments
Collection methods:chemical
Reason for describing collection:general faunal/floral analysis
Collection method comments: Repository: Mikasa City Museum
Metadata
Database number:235546
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2024-07-17 22:20:39 Last modified:2025-02-22 15:12:02
Access level:the public Released:2024-07-17 22:20:39
Creative Commons license:CC0
Reference information

Primary reference:
88914. M. Kaneko and S. V. Solonin. 2024. The first record of the orectolobiform shark genus Cederstroemia (Elasmobranchii, Orectolobidae) in Asia (Kashima Formation, Upper Cretaceous; Oyubari area, Hokkaido, Japan). Rivista Italiana di Paleontologia e Stratigrafia 130:285-297 [M. Clapham/M. Clapham]

Secondary references:

88916 M. Kaneko. 2024. First record on fossil shark teeth of Synechodontiformes from the Kashima Formation (Santonian), Upper Cretaceous Yezo Group in the Oyubari area, Hokkaido, Japan. Journal of Fossil Research 56:18-29 [M. Clapham/M. Clapham/M. Clapham]
88917 M. Kaneko and T. Fujimoto. 2022. The first record of fossil shark teeth of Order Heterodontiformes in Northwest Pacific region from Upper Cretaceous of Kashima Formation (Santonian), Yezo Group, Hokkaido, Japan. Journal of Fossil Research 54:21-30 [M. Clapham/M. Clapham]