| details |
Frasnian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Famennian |
|
Germany(Rhineland) |
Jux,U. Phytoplankton from the Middle Upper Devonian (Nehdinian) of the Southwestern Bergisches Land, Rhenish Schiefergebirge. |
1975 |
| details |
Devonian |
Mississippian |
Tennessee |
Reaugh,A.B. et al. Environment related palynomorph groups in the Chattanooga Black Shale. |
1975 |
| details |
Devonian |
|
|
Jux,U. The wallstructures of Spheromorph acritarchs |
1977 |