| details |
Portlandian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Cenomanian |
Early Turonian |
Czechoslovakia |
SvobodovЎ,M. et al. Some fossil microplankton from the Bohemian Cretaceous. |
1987 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| original |
Portlandian |
|
E.Germany(Rostock) |
Dжring,H. Microplankton from the Jurassic-Cretaceous transition of the Bore Werle (Mecklenburg). |
1961 |