Spore type 17 Zern.,1931
- Citations total:
- 3
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| 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 | Moscovian | USSR(Ukrainian SSR) | Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance | 1962 |