Sporites difficilis
- Citations total:
- 3
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| original | Westphalian C | Germany(Rhineland) | Wicher,C.A. IV. Spore forms in the Flame Coal of the Ruhr area | 1934 | |
| details | Nd | Nd | Spinner,E. Contribution on the megaspore genus Tuberculatisporites (Ibrahim)Potonie and Kremp,1954. | 1968 | |
| details | Visean | Moscovian | Nd | Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance | 1962 |