| details |
Pennsylvanian |
|
USA |
Taylor,T.N. Ultrastructural studies of Paleozoic seed fern pollen |
1982 |
| details |
Late Carboniferous |
|
England(Staffordshire) |
Kurmann,M.H. et al. The ultrastructure of Boulaya fertilis (Medullosales) pollen. |
1984 |
| details |
Westphalian |
|
Scotland |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Nd |
|
Nd |
Potonie,R. Position of the Paleozoic spore genera in the natural system. |
1954 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Nd |
|
Nd |
Potonie,R. New phylogenetic facts on fossil spores. |
1967 |
| details |
Westphalian |
|
Scotland(Lanark) |
Florin,R. On the morphology of the pollen grains in some Palaeozoic Pteridosperms. |
1937 |
| details |
Carboniferous |
|
Scotland |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |