Heterotheca grievii
- Citations total:
- 3
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| details | Early Carboniferous | Scotland | Potonie,R. Synopsis of the Sporae in situ. | 1962 | |
| details | Nd | Nd | Potonie,R. Position of the Paleozoic spore genera in the natural system. | 1954 | |
| details | Nd | Scotland(Fife) | Florin,R. On the morphology of the pollen grains in some Palaeozoic Pteridosperms. | 1937 |