Spore type 9 Zern.,1931
- Citations total:
- 3
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| 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 |