| details |
Early Carboniferous |
|
Scotland |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Carboniferous |
|
England |
Potonie,R. Fossil sporae in situ. Comparison with the sporae dispersae. Addition to the synopsis of the sporae in situ. |
1965 |
| details |
Nd |
|
Nd |
Potonie,R. Position of the Paleozoic spore genera in the natural system. |
1954 |
| details |
Carboniferous |
|
Nd |
Potonie,R. New phylogenetic facts on fossil spores. |
1967 |
| details |
Nd |
|
Scotland |
Florin,R. On the morphology of the pollen grains in some Palaeozoic Pteridosperms. |
1937 |