| details |
Early Carboniferous |
|
Chad |
Pierart,P. The megaspores of the Lower Carboniferous and Lower Gondwana in Africa and South America. |
1989 |
| details |
Carboniferous |
|
Central African Republic |
Pi©rart,P. The Carboniferous megaspores in Central Africa |
1987 |
| details |
Tournaisian |
|
Europe |
DybovЎ-Jachowiczowa,S. et al. Revision of megaspores with Gula from the Carboniferous: Part 1. |
1982 |
| details |
Tournaisian |
|
Congo |
DybovЎ-Jachowiczowa,S. et al. Revision of megaspores with Gula from the Carboniferous: Part 1. |
1982 |