| original |
Late Llandoverian |
|
Sweden |
Schultz,G. Microfossils of the Upper Llandoverian of Dalarne (Sweden). |
1967 |
| original |
Middle Ordovician |
|
Sweden |
Kjellstrжm,G. Middle Ordovician microplankton from the Grotlingbo borehole No.1 in Gotland, Sweden. |
1971 |
| details |
Middle Ordovician |
|
Sweden |
Kjellstrжm,G. Lower Viruan microplankton from a Boring in Oland, Sweden |
1972 |
| details |
Ordovician |
|
Sweden |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. |
1973 |
| details |
Nd |
|
Nd |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. |
1973 |
| details |
Llanvirnian |
Llandeilian |
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. |
1974 |
| details |
Early Llanvirnian |
|
Poland |
Gгrka,H. Middle Ordovician microplankton from Strabla (Poland). |
1980 |
| details |
Early Llanvirnian |
|
Baltic |
Gгrka,H. Middle Ordovician microplankton from Strabla (Poland). |
1980 |
| details |
Early Ordovician |
Late Ordovician |
Finland |
Tynni,R. On Paleozoic microfossils in clastic dykes on the …land Islands and in the core samples of Lumparn. (In: Paleozoic sediments in the Rapakivi area of the …land Islands. L. Bergman, R. Tynni and B. Winterhalter, editors.) |
1982 |
| details |
Ordovician |
Silurian |
France(Lot-et-Garonne) |
Baudelot,S. et al. Paleozoic basins hidden under the Aquitaine: Micropaleontological study of core collected during petroleum investigations. (In: Program of deep geology of France first phase of investigation-1983-1984) |
1984 |
| details |
Arenigian |
Llanvirnian |
Morocco |
Fournier-Vinas,C. Ordovician acritarchs of Zekkara, (East Morocco). |
1985 |
| details |
Middle Ordovician |
|
Sweden |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Llandoverian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Llanvirnian |
Early Ashgillian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Early Caradocian |
|
Sweden |
Wallin,A. et al. Biostratigraphical investigation of Middle Ordovician acritarch the post-impact sequence in the Tvaren-2 core, Sweden. |
1996 |
| details |
Ordovician |
|
Estonia |
Uutela,A. Extent of the Northern Baltic Sea during the Early Palaeozoic Era: New Evidence from Ostrobothnia, western Finland. |
1998 |
| details |
Ordovician |
|
Finland |
Uutela,A. Extent of the Northern Baltic Sea during the Early Palaeozoic Era: New Evidence from Ostrobothnia, western Finland. |
1998 |