Calamospora nebulosa
- Citations total:
- 3
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| original | Pennsylvanian | Iowa | Ravn,R.L. An introduction to the stratigraphic palynology of the Cherokee Group (Pennsylvanian) coals of Iowa. | 1979 | |
| details | Westphalian A | Westphalian B | Europe | Butterworth,M.A. Upper Carboniferous. (In: Pollen and Spore Biostratigraphy of the Phanerozoic in Northwest Europe) | 1984 |
| details | Morrowan | Desmoinesian | Iowa | Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa | 1986 |