original |
Desmoinesian |
|
Illinois |
Schopf,J.M. Spores characteristic of Illinois Coal No. 6. |
1935 |
original |
Carboniferous |
|
Poland |
Zerndt,J. The Suitableness of megaspores as guide fossils. |
1938 |
original |
Westphalian |
|
W.Germany |
Zerndt,J. The Suitableness of megaspores as guide fossils. |
1938 |
original |
Westphalian A |
Westphalian C |
Netherlands |
Dijkstra,S.J. et al. A monographic revision of Carboniferous megaspores with special consideration to South Limburg, (Netherlands). |
1946 |
original |
Bashkirian |
Moscovian |
USSR(Ukrainian SSR) |
Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance |
1962 |
original |
Carboniferous |
|
Poland |
Jachowicz,A. Flora of the Carboniferous:Microflora |
1972 |