Sphenophyllum thonii
- Citations total:
- 2
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| details | Late Rotliegendes | China(Liaoning) | Imgrund,R. Dispersed spores of the Kaiping Basin, their paleontologic and stratigraphic comparison with the Upper Carboniferous of the Ruhr area and the Pennsylvanian of Illinois. | 1960 | |
| details | Stephanian C | France | Doubinger,J. Palynological characters of the Stephanian and the Autunian. | 1962 |