| details |
Westphalian |
|
USA |
Hacquebard,P.A. Palynological studies of some Upper and Lower Carboniferous strata in Nova Scotia. |
1961 |
| details |
Westphalian |
|
Europe |
Hacquebard,P.A. Palynological studies of some Upper and Lower Carboniferous strata in Nova Scotia. |
1961 |
| details |
Desmoinesian |
|
North America |
Frederiksen,N.O. The Rise of the Mesophytic flora |
1972 |
| details |
Nd |
|
Nd |
Foster,C.B. Jugasporites, Leschik,1956, a Late Palaeozoic Operculate pollen genus |
1983 |
| details |
Pennsylvanian |
|
Pennsylvania |
Ferm,J.C. Megaspores of the Middle (?) Kittanning Coal in Beaver County, Pennsylvania. |
1950 |
| details |
Nd |
|
Nd |
Bharadwaj,D.C. On the classification of Gymnospermous, sporae dispersae. |
1974 |
| details |
Nd |
|
Nd |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |