PBDB Collection

Chinomi River CU-CM, Urakawa, sample CM22 (Cretaceous of Japan)

Where: Hokkaido, Japan (42.2° N, 142.8° E: paleocoordinates 48.7° N, 134.0° E)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: U1 Member (Urakawa Formation), Santonian (86.3 - 83.6 Ma)

• sample CM22, Orbiculiforma quadrata zone

• bed-level stratigraphic resolution

Environment/lithology: basinal (); lithified claystone

• claystone with thin layers of sandstone

Size class: microfossils

Primary reference: Y. Taketani. 1982. Cretaceous radiolarian biostratigraphy of the Urakawa and Obira areas, Hokkaido. The Science Reports of the Tohoku University, Serie 2: Geology 52:1-76 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96039: authorized by Wolfgang Kiessling, entered by Uta Merkel on 07.05.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Protozoa
Spumellaria - Orbiculiformidae	Orbiculiforma monticelloensis, Orbiculiforma quadrata Orbiculiforma monticelloensis radiolarian Orbiculiforma quadrata Pessagno 1973 radiolarian
Spumellaria - Pseudoaulophacidae	Pseudoaulophacus lenticulatus, Pseudoaulophacus cf. floresensis Pseudoaulophacus lenticulatus White 1928 radiolarian Pseudoaulophacus cf. floresensis Pessagno 1963 radiolarian
Spumellaria - Spongodiscidae	Spongotripus morenoensis Spongotripus morenoensis radiolarian
Spumellaria - Pyramispongiidae	Pyramispongia glascockensis Pyramispongia glascockensis radiolarian
Spumellaria - Hagiastridae	Crucella espartoensis Crucella espartoensis Pessagno 1971 radiolarian
Spumellaria -	Lithatractus pusillus Lithatractus pusillus Campbell and Clark 1944 radiolarian
Spumellaria - Stylosphaeridae	Protoxiphotractus perplexus Protoxiphotractus perplexus radiolarian
Spumellaria - Archaeospongoprunidae	Archaeospongoprunum bipartitum Archaeospongoprunum bipartitum Pessagno 1973 radiolarian
Nassellaria - Neosciadiocapsidae	Squinabolella putahensis Squinabolella putahensis Pessagno 1969 radiolarian
Nassellaria - Amphipyndacidae	Amphipyndax "sp. A", Amphipyndax stocki Amphipyndax "sp. A" Foreman 1966 radiolarian Amphipyndax stocki Campbell and Clark 1944 radiolarian
Nassellaria - Carpocaniidae	"Stichomitra manifesta" = Novodiacanthocapsa manifesta "Stichomitra manifesta" = Novodiacanthocapsa manifesta Foreman 1978 radiolarian
Nassellaria - Artostrobiidae	Theocampe altamontensis, Theocampe apicata Theocampe altamontensis radiolarian Theocampe apicata Foreman 1971 radiolarian
Nassellaria - Cannobotryidae	Rhopalosyringium cf. magnificum Rhopalosyringium cf. magnificum Campbell and Clark 1944 radiolarian
Nassellaria - Acropyramididae	Cornutella californica Cornutella californica Campbell and Clark 1944 radiolarian var. B
Nassellaria - Archaeodictyomitridae	Mita regina, Dictyomitra formosa Mita regina radiolarian Dictyomitra formosa Squinabol 1904 radiolarian
Nassellaria - Eucyrtidiidae	Stichomitra "sp. B", Stichomitra "sp. A", ? Eucyrtidium matsumotoi, Stichocapsa "sp. A", Solenotryma cf. dacryodes Stichomitra "sp. B" Cayeux 1897 radiolarian Stichomitra "sp. A" Cayeux 1897 radiolarian ? Eucyrtidium matsumotoi Taketani 1982 radiolarian Stichocapsa "sp. A" Haeckel 1881 radiolarian Solenotryma cf. dacryodes Foreman 1968 radiolarian
Nassellaria - Xitidae	"Stichomitra asymbatos" = Xitus asymbatos "Stichomitra asymbatos" = Xitus asymbatos Foreman 1968 radiolarian