| original |
Ludlovian |
|
Spain |
Cramer,F.H. Consideration on the palynology and Silurian paleolatitudes based on microplankton of the Cantabrian Mountains of the Northwest of Spain. |
1969 |
| details |
Early Gothlandian |
|
Argentina(San Juan) |
Pжthe de Baldis,E.D. Lower Silurian acritarchs from Villicum, Province of San Juan, Argentine Precordillera, Argentina. |
1980 |
| details |
Late Famennian |
|
Bolivia |
VavrdovЎ,M. et al. Palynology of selected Devonian strata, Western Gondwana |
2000 |
| details |
Early Arenigian |
|
Argentina(Jujuy) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |