OG-2: Spathian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cyclostomi - Conodontophorida
Cyclostomi - Conodontophorida - Gondolellidae
Neospathodus homeri (Bender 1970)
Protozoa - Entactinaria - Palaeoscenidiidae
Protozoa - Entactinaria - Eptingiidae
Polycystinea - Nassellaria - Poulpidae
Poulpus sp. De Wever 1979
Saitoum sp. Pessagno 1977
Polycystinea - Nassellaria - Archaeosemantidae
Polycystinea - Spumellaria - Pantanelliidae
Polycystinea - Spumellaria - Angulobracchiidae
Protopsium sp. Pessagno and Poisson 1981
see common names

Geography
Country:Japan State/province:Honshu
Coordinates: 36.1° North, 139.0° East (view map)
Paleocoordinates:3.4° North, 135.8° East (Wright 2013)
Basis of coordinate:estimated from map
Time
Period: Triassic Epoch: Early Triassic
Stage: Olenekian 10 m.y. bin: Triassic 1
Key time interval: Spathian Zone:  homeri
Age range of interval: 248.6 - 247 m.y. ago
Stratigraphy
Formation:Ogmata
Lithology and environment
Primary lithology: chert
Environment:marine indet.
Taphonomy
Modes of preservation:body,original silica
Size of fossils:microfossils
Collection methods and comments
Collection excludes:all microfossils
Collection methods:bulk,field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:220599
Authorizer:W. Foster Enterer:W. Foster
Research group:micropaleontology
Created:2021-06-10 14:31:06 Last modified:2025-02-22 15:12:02
Access level:the public Released:2021-06-10 14:31:06
Creative Commons license:CC0
Reference information

Primary reference:
77108. K. Sashida. 1991. Early Triassic radiolarians from the Ogmata Formation, Kanto Mountains, Central Japan Part 2. Trans. Proc. Palaeont. Soc. Japan, N.S 161:681-696 [W. Foster/W. Foster]