PBDB Collection

Minowa Quarry, YZH section, Kuzuu, samples 05-24: Anisian, Japan

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Polycystinea - Spumellaria - Capnuchosphaeridae

	Plafkerium sp. Pessagno et al. 1979

	? Plafkerium sp. Pessagno et al. 1979

	? Plafkerium antiquum Sugiyama 1992
Polycystinea - Spumellaria - Angulobracchiidae

	Protopsium sp. Pessagno and Poisson 1981
Polycystinea - Nassellaria - Ruesticyrtiidae

	Triassocampe sp. Dumitrica et al. 1980
Polycystinea - Nassellaria - Poulpidae

	Hozmadia sp. Dumitrica et al. 1980

	? Hozmadia sp. Dumitrica et al. 1980

	Hozmadia ozawai Sugiyama 1992
Protozoa - Entactinaria - Palaeoscenidiidae

	Parentactinia nakatsugawaensis Sashida 1983

	Parentactinia okuchichibuensis (Sashida 1991)
Protozoa - Entactinaria - Multiarcusellidae

	Tiborella informal sp. B

	Tiborella sp. Dumitrica et al. 1980

	Tiborella agria Sugiyama 1992

	Tiborella aff. agria Sugiyama 1992
Protozoa - Entactinaria - Kungalariidae

	Pentabelus furutanii Sugiyama 1992
Protozoa - Entactinaria - Hindeosphaeridae

	Pseudostylosphaera informal sp. A

	Pseudostylosphaera informal sp. B

	Pseudostylosphaera sp. Kozur and Mostler 1981
Protozoa - Entactinaria - Eptingiidae

	Cryptostephanidium informal sp. A

	Cryptostephanidium informal sp. D

	Cryptostephanidium sp. Dumitrica 1978

	Cryptostephanidium japonicum (Nakaseko and Nishimura 1979)

	Cryptostephanidium longispinosum (Sashida 1991)

	Eptingium informal sp. A

	Eptingium sp. Dumitrica 1978

	Eptingium nakasekoi Kozur and Mostler 1994
Protozoa - Entactinaria - Entactiniidae

	Entactinosphaera sp. Foreman 1963
see common names

Geography

Country:	Japan	State/province:	Tochigi
Coordinates:	36.4° North, 139.6° East (view map)
Paleocoordinates:	5.1° North, 137.9° East (Wright 2013)
Basis of coordinate:	based on nearby landmark
Geographic resolution:	small collection

Time

Period:	Triassic	Epoch:	Middle Triassic
Stage:	Anisian	10 m.y. bin:	Triassic 2
Key time interval:	Anisian
Age range of interval:	247 - 241.464 m.y. ago

Stratigraphy

Stratigraphic resolution:	group of beds
Stratigraphy comments: 10 samples (YZH-05 - YZH-24), Hozmadia ozawai zone

Lithology and environment

Primary lithology:	lithified chert
Lithology description: dark gray and black chert, cherty sandstone
Environment:	basinal (siliceous)

Taphonomy

Modes of preservation:	body
Size of fossils:	microfossils

Collection methods and comments

Collection methods:	field collection
Reason for describing collection:	biostratigraphic analysis

Metadata

Database number:	96061
Authorizer:	W. Kiessling	Enterer:	U. Merkel
Research group:	micropaleontology
Created:	2010-05-11 05:35:46	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	2010-05-11 05:35:46
Creative Commons license:	CC0

Reference information

Primary reference:

32604.

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]