| details |
Middle Ordovician |
Late Ordovician |
New York |
Jacobson,S.R. Middle and Upper Ordovician acritarchs, Eastern Midcontinent, USA. |
1977 |
| details |
Middle Ordovician |
Late Ordovician |
Ohio |
Jacobson,S.R. Middle and Upper Ordovician acritarchs, Eastern Midcontinent, USA. |
1977 |
| details |
Caradocian |
|
Ohio |
Jacobson,S.R. Acritarch biostratigraphy of Middle and Late Ordovician Carbonate rocks of the Trenton Group, New York, and equivalent strata in the Cincinnati region. |
1977 |
| details |
Silurian |
|
Yugoslavia |
Pantic,N.K. The importance of paleopalynological investigation of metamorphic rocks in central and southeastern Europe |
1975 |
| details |
Cambrian |
Ordovician |
Yugoslavia |
Pantic,N.K. The importance of paleopalynological investigation of metamorphic rocks in central and southeastern Europe |
1975 |
| details |
Nd |
|
Nd |
Loeblich,A.R.,Jr. Protistan phylogeny as indicated by the fossil record. |
1974 |
| details |
Tremadocian |
|
France |
Rauscher,R. Ordovician acritarchs from France. |
1974 |
| details |
Early Devonian |
Middle Devonian |
Egypt |
Kruchinina,N.V. et al. Paleozoic spore-pollen complexes of some regions of Egypt. |
1974 |
| details |
Late Cambrian |
Early Ordovician |
Nd |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Middle Cambrian |
Ordovician |
Eurasia |
Timofeev,B.V. Proterozoic and early microfossils. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Llanvirnian |
|
Bulgaria |
Kalvacheva,R.K. et al. Occurence of acritarchs in the Lower Paleozoic in the Iskur Gorge. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Early Ordovician |
Middle Ordovician |
USSR(Russian Platform) |
Andreeva,E.M. The Upper Proterozoic and Lower Paleozoic microfossils from some Regions of the Russian Platform. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Ordovician |
Silurian |
Bulgaria |
Kalvacheva,R.K. Preliminary results from palynological studies of the Lower Paleozoic in the Iskur Gorge. |
1972 |
| details |
Vendian |
Cambrian |
W.Germany(Niedersachsen) |
Cramer,F.H. et al. Taxonomic considerations on the acritarchs of the Middle and Upper Silurian of northern Spain. |
1968 |
| details |
Nd |
|
France |
Alpern,B. et al. Palaeobotany and palynology in France: a historical review. |
1968 |
| details |
Nd |
|
Nd |
Brito,I.M. The acritarchs |
1967 |
| details |
Early Ashgillian |
|
Czechoslovakia |
VavrdovЎ,M. Palaeozoic microplankton from central Bohemia. |
1966 |