| details |
Westphalian C |
|
W.Germany(N.Rhine) |
Lachkar,G. New definitions of the megaspore genera Valvisisporites and Pseudovalvisisporites and their principal species. |
1968 |
| details |
Late Moscovian |
|
USSR(Ukrainian SSR) |
Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance |
1962 |
| details |
Early Westphalian B |
Middle Westphalian C |
W.Germany(N.Rhine) |
Potonie,R. et al. The spore dispersae of the Rhur Carboniferous, their morphography and stratigraphy with reviews of species of other areas.Part 2 |
1956 |
| details |
Westphalian B |
Westphalian C |
Czechoslovakia |
KalibovЎ,M. Megaspores of the Radnice Coal Measure zone of the Kladno-Rakovnik Coal Basin. |
1951 |
| details |
Late Pottsville |
|
West Virginia |
Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky |
1947 |
| details |
Late Pottsville |
|
Kentucky |
Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky |
1947 |
| details |
Early Westphalian C |
|
Germany |
Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. |
1944 |
| details |
Carboniferous |
|
Germany |
Kirchheimer,F. Fossil spores and pollen grains as Thermometer of Coalification. |
1934 |
| details |
Westphalian C |
|
Germany(Rhineland) |
Wicher,C.A. IV. Spore forms in the Flame Coal of the Ruhr area |
1934 |
| original |
Westphalian C |
|
W.Germany(N.Rhine) |
Stach,E. et al. Spores in the Flame, Gasflame and Gascoal of the Ruhr Coal. |
1931 |