| original |
Middle Pennsylvanian |
|
Illinois |
Millay,M.A. et al. Idanothekion, gen.nov., a synangiate pollen organ with saccate pollen from the Middle Pennsylvanian of Illinois. |
1970 |
| details |
Middle Pennsylvanian |
|
Illinois |
Potonie,R. Examples of the natural system of spores, a supplement to the synopsis of the Sporae in situ, 1963 and the research reports from 1965,1967, and 1970 and to the phylogenetic sporolog 1973 |
1975 |
| details |
Middle Pennsylvanian |
|
USA |
Millay,M.A. et al. Evolutionary trends in fossil Gymnosperm pollen |
1976 |
| details |
Early Permian |
|
Nd |
Millay,M.A. et al. Paleozoic seed fern pollen organs. |
1979 |