| details |
Middle Ashgillian |
Late Ashgillian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Ordovician |
|
Baltic |
Sheshegova,L.I. The acritarchs of the Paleozoic. |
1971 |
| details |
Porkuni |
|
Lithuania |
Pa?keviciene,L. et al. The composition, distribution and evolution of Ordovician brachiopods, conodonts and acritarchs in the South-eastern part of the Baltic basin. |
2001 |
| details |
Ordovician |
|
Baltic |
Norris,G. et al. A descriptive index of genera of fossil Dinophyceae and acritarcha. |
1965 |
| details |
Late Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ordovician |
|
Baltic |
Eisenack,A. Microfossils from the Baltic Ordovician. 2: Vaginatenkalk to Lyckholmer Stufe. |
1962 |
| details |
Caradocian |
Ashgillian |
USSR(Estonian SSR) |
Eisenack,A. The microfauna of the Ostseekalke. 1. Chitinozoa, Hystrichosphaeres. |
1965 |
| details |
Late Ordovician |
|
USSR(Estonian SSR) |
Eisenack,A. Contribution to acritarch research. |
1974 |
| details |
Late Ordovician |
|
Finland |
Eisenack,A. Contribution to acritarch research. |
1974 |
| details |
Middle Ordovician |
Silurian |
Baltic |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. |
1976 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Middle Caradocian |
Early Ashgillian |
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. 2: Index to Parts 1 and 2. |
1977 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Late Ludlovian |
|
Libya |
Al-Ameri,T.K. Palynological application for the palaeogeography of Tripolitania during the Silurian time |
1983 |