| details |
Silurian |
|
Baltic |
Deflandre,G. The problem of Hystrichospheres. |
1947 |
| details |
Nd |
|
Nd |
De Coninck,J. Organic walled microfossils of the Lower Ypresian of Quenast. |
1986 |
| details |
Middle Ordovician |
|
USSR(Russian Platform) |
Andreeva,E.M. et al. Palaeopalynology. (Three Volumes: Volume I: Methods. Volume II: Complexes of palynomorphs of the Precambrian-Holocene of the USSR. Volume III: Figures and Plates. Editor-I.M. Pokrovskaya) |
1966 |
| details |
Middle Ordovician |
|
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 |