OG-2: Spathian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Protozoa
- Entactinaria
- Eptingiidae
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Spongostephanidium longispinosum
Sashida 1991
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| recombined as Cryptostephanidium longispinosum | |||||||
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Protozoa
- Entactinaria
- Palaeoscenidiidae
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Pactarentinia koikei
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Parentactinia virgata
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Parentactinia nakatsugawaensis
Sashida 1983
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Protozoa
- Nassellaria
- Poulpidae
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Saitoum sp.
Pessagno 1977
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Poulpus sp.
De Wever 1979
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Protozoa
- Nassellaria
- Archaeosemantidae
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Archaeosemantis venusta
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Archaeosemantis aff. venusta
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Archaeosemantis sp.
Dumitrica 1982
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Archaeosemantis okuchichibuensis
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Protozoa
- Spumellaria
- Angulobracchiidae
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Protopsium sp.
Pessagno and Poisson 1981
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Protozoa
- Spumellaria
- Pantanelliidae
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? Pantanellium virgeum
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Conodonta
- Ozarkodinida
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Ozarkodina sp.
Branson and Mehl 1933
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Conodonta
- Ozarkodinida
- Gondolellidae
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Neospathodus homeri
(Bender 1970)
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| recombined as Triassospathodus homeri | |||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Honshu |
| Coordinates: | 36.1° North, 139.0° East (view map) | ||
| Paleocoordinates: | 36.1° North, 115.8° East | ||
| Basis of coordinate: | estimated from map |
Time
| Period: | Triassic | Epoch: | Early/Lower Triassic |
| Stage: | Olenekian | 10 m.y. bin: | Triassic 1 |
| Key time interval: | Spathian | Zone: | homeri |
| Age range of interval: | 248.90000 - 247.20000 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: | 2021-06-10 14:31:06 |
| Access level: | the public | Released: | 2021-06-10 14:31:06 |
| Creative Commons license: | CC BY |
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] |