| original |
Early Permian |
Middle Permian |
Congo |
Maheshwari,H.K. et al. Palaeozoic sporae dispersae from Congo. 8. The Kibamba River (Lukuga Coalfield area). |
1969 |
| details |
Late Artinskian |
|
Madagascar |
Rakotoarivelo,H.J. Palynostratigraphic review of the coal basin of the Sakoa-Sakamena, (Madagascar). |
1970 |
| details |
Late Artinskian |
|
Madagascar |
Rakotoarivelo,H.J. The age of the Sakoa-Sakamena Gondwanic Coalfield southwest Madagascar. |
1971 |
| details |
Permian |
|
Congo |
Potonie,R. Synopsis of the genera of the sporae dispersae.Part 7 |
1975 |