| details |
Pennsylvanian |
|
USA |
Kedves,M. Tranmission Electron Microscopy of the Fossil Gymnosperm Exines. |
1994 |
| details |
Paleozoic |
|
Nd |
Taylor,T.N. Pollen and pollen organ evolution in early seed plants. |
1981 |
| details |
Nd |
|
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 |
Middle Pennsylvanian |
|
Kansas |
Millay,M.A. et al. Morphological studies of Paleozoic saccate pollen. |
1974 |
| details |
Middle Pennsylvanian |
|
Iowa |
Millay,M.A. et al. Morphological studies of Paleozoic saccate pollen. |
1974 |
| details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |