Procoronaspora williamsii
- Citations total:
- 3
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| original | Chesterian | Canada(Alberta) | Staplin,F.L. Upper Mississippian plant spores from the Golata Formation, Alberta, Canada. | 1960 | |
| details | Visean | Arctic Ocean | Kaiser,H. The Upper Devonian flora of Bear Island. 3. Microflora of the Uppermost Upper Devonian and Lower Carboniferous. | 1970 | |
| details | Chesterian | Canada(Alberta) | Playford,G. et al. Lower Carboniferous (Visean) spores of the Bonaparte Gulf Basin, Northwestern Australia. Part II. | 1986 |