| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores of the Polish Coal Basin. Part 2. the Marginal Group. |
1937 |
| details |
Desmoinesian |
|
Illinois |
Schopf,J.M. The paleobotanical significance of plant structure in coal. |
1936 |
| details |
Desmoinesian |
|
Illinois |
Schopf,J.M. Spores characteristic of Illinois Coal No. 6. |
1935 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Polish Coal Basin. first Part. |
1934 |
| details |
Westphalian C |
|
USSR(Moscow Basin) |
Wicher,C.A. Concerning the abortive appearance of fossil spores and their phylogenetic significance |
1934 |
| details |
Westphalian C |
|
Germany(Rhineland) |
Wicher,C.A. IV. Spore forms in the Flame Coal of the Ruhr area |
1934 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores of the Zwickau and Lugau-Oelsnitz Carboniferous. |
1932 |
| original |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores as guide fossils of the productive Coal Measures. |
1931 |
| original |
Carboniferous |
|
Poland |
Zerndt,J. Triletes giganteus, n.sp., a very large megaspore from the Carboniferous. |
1930 |