Where: Kanto, Japan (36.5° N, 139.6° E: paleocoordinates 36.4° N, 116.5° E)
• coordinate stated in text
When: Ashio Belt Group, Spathian (251.3 - 247.2 Ma)
Environment/lithology: basinal (siliceous); lithified chert
Size class: microfossils
Preservation: original silica
Collection methods: bulk, chemical,
Primary reference: N. Suzuki, N. Akiba, and H. Kanoh. 2002. Late Olenekian Radiolarians from Bedded Chert of Ashio Terrane Northeast Japan and Faunal Turnovers in Western Panthalassa during Early Triassic. Journal of China University of Geosciences 13(2):124-140 [W. Foster/W. Foster]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 220563: authorized by William Foster, entered by William Foster on 09.06.2021
Creative Commons license: CC BY (attribution)
Taxonomic list
| Protozoa | |
|
? Copicyntra sp. Nazarov and Ormiston 1985 radiolarian
Entactinosphaera chiakensis radiolarian | |
|
Cryptostephanidium sp. Dumitrica 1978 radiolarian
Cryptostephanidium longispinosum Sashida 1991 radiolarian | |
|
Pseudostylosphaera sp. Kozur and Mostler 1981 radiolarian | |
|
Parentactinia nakatsugawaensis Sashida 1983 radiolarian
Pactarentinia koikei radiolarian | |
|
Hozmadia sp. Dumitrica et al. 1980 radiolarian | |
|
Spumellaria spp. Ehrenberg 1875 radiolarian | |
|
Plafkerium sp. Pessagno et al. 1979 radiolarian | |