Perotrilites graysonii
- Citations total:
- 2
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| original | Tournaisian | Canada(New Brunswick) | Varma,C.P. Lower Carboniferous miospores from the Albert Oil Shales (Horton Group) of New Brunswick, Canada. | 1969 | |
| details | Tournaisian | Canada(New Brunswick) | Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa | 1986 |