| details |
Late Cambrian |
Ordovician |
Algeria |
de Jekhowsky,B. Organic microfossils (spores, hystrichospheres, chitinozoans, etc.), of the Saharan Pre-Quaternary |
1965 |
| details |
Proterozoic |
|
USSR |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Proterozoic |
Middle Ordovician |
Europe |
Schopf,J.M. Early Paleozoic palynomorphs. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |
| details |
Proterozoic |
Middle Ordovician |
North America |
Schopf,J.M. Early Paleozoic palynomorphs. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |