Spore sp.C4
- Citations total:
- 2
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| original | Carboniferous | England | Knox,E.M. The spores of Pteridophyta, with observations on microspores in Coals of Carboniferous age. | 1939 | |
| original | Early Carboniferous | England | Crookall,R. et al. The Carboniferous "microspores" that have been designated "C1" by various authors. | 1952 |