| original |
Tremadocian |
|
Algeria |
Jardin©,S. et al. Stratigraphic distribution of acritarchs in the Palaeozoic of the Algerian Sahara. |
1974 |
| details |
Tremadocian |
|
Algeria |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Tremadocian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ashgillian |
|
China(Zeijing) |
He,S.-C. et al. Late Ordovician acritarchs from changwu Formation of Jiangshan, Zhejiag, China |
1993 |
| details |
Late Cambrian |
Early Ordovician |
Algeria |
Stricanne,L. et al. A statistical approach to classification of the Cambro-Ordovician galeate acritarch plexus |
2002 |