| original |
Late Arenigian |
Early Llandeilian |
Australia(W.Australia) |
Playford,G. et al. Ordovician acritarchs from the Canning Basin, Western Australia |
1984 |
| details |
Arenigian |
Llanvirnian |
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Llanvirnian |
Middle Ashgillian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| 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 |
| details |
Latorp |
Uhaku |
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 |