| original |
Oligocene |
|
Japan(Fukushima Pref.) |
Takahashi,K. Microplankton from the Asagai Formation in the Joban Coal Field. |
1964 |
| details |
Maastrichtian |
|
Japan(Hokkaido I.) |
Takahashi,K. Upper Cretaceous microfossils from Nishibetsu, Hokkaido. |
1965 |
| details |
Late Cretaceous |
|
Japan(Hokkaido I.) |
Takahashi,K. Upper Cretaceous and Lower Paleogene microfloras of Japan. |
1967 |
| details |
Late Cretaceous |
|
Japan(Hokkaido I.) |
Takahashi,K. Some Cretaceous palynomorphs from the Upper Cretaceous sediments of Hokkaido. |
1970 |
| details |
Oligocene |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Oligocene |
|
Japan |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |