Where: Tochigi, Japan (36.4° N, 139.6° E: paleocoordinates 39.7° N, 117.5° E)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Anisian (247.2 - 242.0 Ma)
• 4 samples (YZH-36 - YZH-42), Pseudostylosphaera japonica interval zone
• group of beds-level stratigraphic resolution
Environment/lithology: basinal (siliceous); lithified chert
Size class: microfossils
Primary reference: M. Ohtaka, Y. Aita, and T. Sakai. 1998. Middle Triassic radiolarian biostratigraphy of the bedded chert in the Minowa quarry, Kuzuu Town, Ashio Mountains. News of Osaka Micropaleontologists, Special Volume 11:95-113 [W. Kiessling/U. Merkel]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 96063: authorized by Wolfgang Kiessling, entered by Uta Merkel on 11.05.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
Protozoa | |
Pseudostylosphaera sp., Pseudostylosphaera japonica, Pseudostylosphaera tenuis, Pseudostylosphaera longispinosa, Pseudostylosphaera compacta, "Pseudostylosphaera spinulosa" = Hindeosphaera spinulosa
Pseudostylosphaera sp. Kozur and Mostler 1981 radiolarian
Pseudostylosphaera japonica Nakaseko and Nishimura 1979 radiolarian
Pseudostylosphaera tenuis Nakaseko and Nishimura 1979 radiolarian
Pseudostylosphaera longispinosa Kozur and Mostler 1981 radiolarian
Pseudostylosphaera compacta Nakaseko and Nishimura 1979 radiolarian
"Pseudostylosphaera spinulosa" = Hindeosphaera spinulosa Nakaseko and Nishimura 1979 radiolarian | |
Tiborella "sp. A" Dumitrica et al. 1980 radiolarian
Tiborella "sp. B" Dumitrica et al. 1980 radiolarian
Tiborella sp. Dumitrica et al. 1980 radiolarian
Tiborella aff. agria Sugiyama 1992 radiolarian | |
Entactinosphaera sp. Foreman 1963 radiolarian | |
Eptingium "sp. A", Eptingium sp., Eptingium nakasekoi, Cryptostephanidium "sp. A", Cryptostephanidium "sp. C", Cryptostephanidium sp., Cryptostephanidium japonicum
Eptingium "sp. A" Dumitrica 1978 radiolarian
Eptingium sp. Dumitrica 1978 radiolarian
Eptingium nakasekoi Kozur and Mostler 1994 radiolarian
Cryptostephanidium "sp. A" Dumitrica 1978 radiolarian
Cryptostephanidium "sp. C" Dumitrica 1978 radiolarian
Cryptostephanidium sp. Dumitrica 1978 radiolarian
Cryptostephanidium japonicum Nakaseko and Nishimura 1979 radiolarian | |
Parentactinia nakatsugawaensis Sashida 1983 radiolarian | |
Triassocampe "sp. A", Triassocampe "sp. B", Triassocampe "sp. C", Triassocampe "sp. F", Triassocampe "sp. G", Triassocampe sp., Triassocampe myterocorys, Triassocampe coronata, Annulotriassocampe campanilis
Triassocampe "sp. A" Dumitrica et al. 1980 radiolarian
Triassocampe "sp. B" Dumitrica et al. 1980 radiolarian
Triassocampe "sp. C" Dumitrica et al. 1980 radiolarian
Triassocampe "sp. F" Dumitrica et al. 1980 radiolarian
Triassocampe "sp. G" Dumitrica et al. 1980 radiolarian
Triassocampe sp. Dumitrica et al. 1980 radiolarian
Triassocampe myterocorys Sugiyama 1992 radiolarian
Triassocampe coronata Bragin 1991 radiolarian
Annulotriassocampe campanilis Kozur and Mostler 1994 radiolarian | |
Hozmadia sp. Dumitrica et al. 1980 radiolarian | |
Spongosilicarmiger sp. Kozur 1984 radiolarian | |
Plafkerium sp. Pessagno et al. 1979 radiolarian
? Plafkerium antiquum Sugiyama 1992 radiolarian
Sarla "sp. A" Pessagno et al. 1979 radiolarian |