Where: Hokkaido, Japan (42.2° N, 142.8° E: paleocoordinates 49.4° N, 134.9° E)
• coordinate based on nearby landmark
• hand sample-level geographic resolution
When: U1 Member (Urakawa Formation), Coniacian (89.8 - 86.3 Ma)
• sample CU04, Archaeospongoprunum triplum zone
• bed-level stratigraphic resolution
Environment/lithology: basinal (); lithified claystone
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 96032: authorized by Wolfgang Kiessling, entered by Uta Merkel on 07.05.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
Protozoa | |
Squinabolella putahensis Pessagno 1969 radiolarian | |
Dictyomitra formosa Squinabol 1904 radiolarian | |
| |
Amphipyndax stocki Campbell and Clark 1944 radiolarian | |
? Eucyrtidium matsumotoi Taketani 1982 radiolarian | |
"Stichomitra asymbatos" = Xitus asymbatos
"Stichomitra asymbatos" = Xitus asymbatos Foreman 1968 radiolarian | |
"Stichomitra manifesta" = Novodiacanthocapsa manifesta
"Stichomitra manifesta" = Novodiacanthocapsa manifesta Foreman 1978 radiolarian | |
Theocampe altamontensis radiolarian
Theocampe apicata Foreman 1971 radiolarian | |
Lithatractus pusillus Campbell and Clark 1944 radiolarian | |
Pseudoaulophacus lenticulatus White 1928 radiolarian
Pseudoaulophacus cf. floresensis Pessagno 1963 radiolarian | |
Praeconocaryomma californiaensis Pessagno 1976 radiolarian | |
Archaeospongoprunum triplum radiolarian
Archaeospongoprunum bipartitum Pessagno 1973 radiolarian | |
Pyramispongia glascockensis radiolarian | |
Orbiculiforma monticelloensis radiolarian
Orbiculiforma quadrata Pessagno 1973 radiolarian |