Conostoma anglo-germanicum
- Citations total:
- 2
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| details | Westphalian | England | Florin,R. On the morphology of the pollen grains in some Palaeozoic Pteridosperms. | 1937 | |
| details | Pennsylvanian | Iowa | Schabilion,J.T. et al. A tetrahedral megaspore arrangement in a seed fern ovule of Pennsylvanian age. | 1979 |