| details |
Late Stephanian |
|
Czechoslovakia |
Zerndt,J. Megaspores from the Westphalian and Stephanian in Bohemia. |
1937 |
| details |
Stephanian |
|
France |
Florin,R. On the morphology of the pollen grains in some Palaeozoic Pteridosperms. |
1937 |
| details |
Westphalian |
|
W.Germany(Saarland) |
Zerndt,J. Megaspores of the Saar Carboniferous |
1940 |
| details |
Pennsylvanian |
|
Illinois |
Schopf,J.M. Pteridosperm male fructifications |
1948 |
| details |
Westphalian B |
Westphalian C |
Czechoslovakia |
KalibovЎ,M. Megaspores of the Radnice Coal Measure zone of the Kladno-Rakovnik Coal Basin. |
1951 |
| details |
Late Stephanian |
|
Czechoslovakia |
Obrhel,J. Two discoveries from the Upper Stephanian of the Kladno Coal Basin (?Dolerotheca Fertilis (Renault) and Callipteridium Trigonu Franke). |
1960 |
| details |
Stephanian |
|
France |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Stephanian |
|
France |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Westphalian A |
Westphalian C |
Poland |
Jachowicz,A. The Upper Carboniferous |
1970 |
| details |
Westphalian A |
Westphalian B |
Poland |
Jachowicz,A. The Upper Carboniferous |
1970 |
| details |
Pennsylvanian |
|
USA |
Taylor,T.N. Ultrastructural studies of Paleozoic seed fern pollen |
1982 |
| details |
Carboniferous |
|
France |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |