| details |
Late Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| original |
Silurian |
|
USSR(Estonian SSR) |
Eisenack,A. On Hystrichospheres and other microffossils of the Baltic Silurian and Cambrian |
1951 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Eisenack,A. On Hystrichospheres and other microffossils of the Baltic Silurian and Cambrian |
1951 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Tremadocian |
|
England(Shropshire) |
Downie,C. An assemblage of microplankton from the Shineton Shale (Tremadocian) |
1958 |
| original |
Tremadocian |
|
England(Shropshire) |
Downie,C. An assemblage of microplankton from the Shineton Shale (Tremadocian) |
1958 |
| details |
Nd |
|
Nd |
Deflandre,G. et al. Nomenclature and systematics of Hystrichospheres (Sens.Lat.) observations and recitifications. |
1961 |
| details |
Middle Cambrian |
|
USSR(Russian Platform) |
Andreeva,E.M. Spore and pollen assemblages in Upper Proterozoic and Paleozoic deposits of some Regions of the USSR |
1962 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Andreeva,E.M. Guide complexes of plant microfossils of the Upper Proterozoic and lower deposits of the Russian Platform. (In: Palynology, Method and Stratigraphy) |
1973 |