| details |
Wenlockian |
|
Sweden |
Cramer,F.H. et al. Acritarchs. (In: Lower Wenlock faunal and flora dynamics-Vattenfallet section, Gotland. V.Jaanusson, S.Laufeld and R.Skoglund, editors) |
1979 |
| details |
Wenlockian |
|
England |
Eisenack,A. New types of Baltic Silurian Hystrichospheres and new species. |
1959 |
| original |
Wenlockian |
|
Canada(Ontario) |
Cramer,F.H. Distribution of selected Silurian acritarchs an account of the palynostratigraphy and paleogeography of selected Silurian acritarch Taxa |
1970 |
| original |
Wenlockian |
|
New York |
Cramer,F.H. Distribution of selected Silurian acritarchs an account of the palynostratigraphy and paleogeography of selected Silurian acritarch Taxa |
1970 |
| details |
Wenlockian |
Ludlovian |
England |
Cramer,F.H. Distribution of selected Silurian acritarchs an account of the palynostratigraphy and paleogeography of selected Silurian acritarch Taxa |
1970 |
| details |
Wenlockian |
|
Sweden |
Eisenack,A. Microfossils of the Gotland Silurian. Hystrichospheres and questionable types |
1965 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Umnova,N.I. et al. Acritarch assemblages from the Cambrian and Early Ordovician sediments of western and northwestern Russian Platform. (In: Palynology research in Byelorussia and other Regions of the USSR) |
1971 |
| details |
Tremadocian |
|
USSR(Estonian SSR) |
Aristova,K.E. Assemblages of microplant fossils of Lower and Middle Ordovician type sections of Estonia |
1976 |
| details |
Tremadocian |
|
USSR(Estonian SSR) |
Aristova,K.E. Assemblages of microplant fossils of Lower and Middle Ordovician type sections of Estonia |
1976 |
| details |
Tremadocian |
Ashgillian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Tremadocian |
Ashgillian |
USSR(Pre-Baltic) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Silurian |
|
USSR(Baltic) |
Eisenack,A. New types of Baltic Silurian Hystrichospheres and new species. |
1959 |
| details |
Silurian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Silurian |
|
USSR(Lithuanian SSR) |
Bagdasaryan,L.L. Results of micropalaeophytological investigations of oils and stratum waters. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Paleozoic |
|
Nd |
Downie,C. et al. On the interpretation and status of some Hystrichosphere genera. |
1963 |
| details |
Ordovician |
|
Baltic |
Eisenack,A. Microfossils from the Baltic Ordovician. 2: Vaginatenkalk to Lyckholmer Stufe. |
1962 |
| details |
Ordovician |
|
Poland |
Jagielska,L. Flora of the Ordovician;Microflora |
1972 |