| details |
Pennsylvanian |
|
Poland |
Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. |
1944 |
| details |
Nd |
|
Nd |
Winslow,M.R. Upper Mississippian and Pennsylvanian megaspores and other plant microfossils from Illinois. |
1959 |
| details |
Permian |
|
Turkey |
Yahsiman,K. et al. Permian megaspores from Hazru (Diyarbakir). |
1959 |
| details |
Late Morrowan |
|
Oklahoma |
Felix,C.J. et al. An American occurrence of Spencerisporites. |
1959 |
| details |
Late Morrowan |
|
Texas |
Felix,C.J. et al. An American occurrence of Spencerisporites. |
1959 |