Sphenophyllum
- Citations total:
- 3
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| details | Nd | Nd | Potonie,R. Position of the Paleozoic spore genera in the natural system. | 1954 | |
| details | Nd | Nd | Pant,D.D. Suggestions for the classification and nomenclature of fossil spores and pollen grains | 1954 | |
| details | Pennsylvanian | North America | Arnold,C.A. The fossil-plant record. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) | 1969 |