| details |
Middle Pennsylvanian |
|
USA(Mid-Continent) |
Millay,M.A. et al. The ultrastructure of Paleozoic fern spores. |
1982 |
| details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Permian |
|
Nd |
Taylor,T.N. et al. In situ, pollen and spores in plant evolution. 14C -Importance of in situ, pollen and spores in understanding the biology and evolution of fossil plants. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Westphalian D |
|
Illinois |
Millay,M.A. et al. An unusual Botryopterid sporangial aggregation from the Middle Pennsylvanian of North America. |
1980 |
| details |
Middle Pennsylvanian |
|
Illinois |
Kedves,M. Tranmission Electron Microscopy of the Fossil Spores. |
1996 |