| details |
Emsian |
Famennian |
USA |
Wood,G.D. The paleogeographic, paleoecologic and stratigraphic significance of acritarchs Umbellasphaeridium saharicum and Umbellasphaeridium deflandrei |
1979 |
| details |
Emsian |
Famennian |
Peru |
Wood,G.D. The paleogeographic, paleoecologic and stratigraphic significance of acritarchs Umbellasphaeridium saharicum and Umbellasphaeridium deflandrei |
1979 |
| details |
Emsian |
Famennian |
Africa |
Wood,G.D. The paleogeographic, paleoecologic and stratigraphic significance of acritarchs Umbellasphaeridium saharicum and Umbellasphaeridium deflandrei |
1979 |
| details |
Givetian |
|
Ohio |
Wicander,R. et al. Systematics and biostratigraphy of the organic-walled microphytoplankton from the Middle Devonian, (Givetian), Silica Formation, Ohio, USA. |
1981 |
| details |
Early Llanvirnian |
|
Czechoslovakia |
VavrdovЎ,M. Nethromorphitae and some other acritarchs from the Bohemian Lower Ordovician |
1978 |
| details |
Emsian |
Early Eifelian |
Bolivia |
Suarez-Soruco,R. et al. The Eo-Hercynian compression stage in the eastern part of the Cordillerana Basin of Bolivia. |
1983 |
| details |
Siegenian |
|
Brazil(Paraiba) |
Rubinstein,C.V. Silurian acritarchs from South America: A review. |
1996 |
| details |
Famennian |
|
Paraguay |
Pжthe de Baldis,E.D. Acritarchs and chitinozoans from the Late Devonian of Paraguay. |
1978 |
| details |
Devonian |
|
South America |
Nautiyal,A.C. The paleogeographic distribution of Devonian acritarchs and biofacies belts. |
1977 |
| details |
Devonian |
|
South America |
Nautiyal,A.C. The paleogeographic distribution of Devonian acritarchs and biofacies belts. |
1977 |
| details |
Ashgillian |
Early Llandoverian |
Belgium |
Martin,F. The Upper Ordovician and Lower Silurian at Deerlijk (Belgium) |
1973 |
| details |
Caradocian |
Ashgillian |
Canada(Newfoundland) |
Legault,J.A. First report of Ordovician, (Caradoc-Ashgill) palynomorphs from Orphan Knoll, Labrador Sea. |
1982 |
| details |
Middle Devonian |
Late Devonian |
|
Lange,F.W. Biostratigraphic subdivision and correlation of the Devonian in the Parana Basin |
1967 |
| details |
Eifelian |
Givetian |
Algeria |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Siegenian |
Givetian |
Algeria |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Siegenian |
Givetian |
France |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Emsian |
Givetian |
Brazil |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |