| original |
Silurian |
|
Baltic |
Eisenack,A. New microfossils of the Baltic Silurian and new microfossils of the Bohemian Silurian.3. |
1934 |
| details |
Early Oligocene |
|
Poland |
Eisenack,A. Phosphorite nodules of the Amber Formation as transmitters of Tertiary plankton. |
1938 |
| details |
Ordovician |
|
France(Finistere) |
Deunff,J. Veryhachium, new genus of Paleozoic hystrichospheres. |
1954 |
| details |
Ordovician |
|
Baltic |
Eisenack,A. Microfossils from the Baltic Ordovician. 2: Vaginatenkalk to Lyckholmer Stufe. |
1962 |
| details |
Silurian |
|
Baltic |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Late Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |