| details |
Middle Pennsylvanian |
|
Kentucky |
Dimichele,W.A. et al. Lycopods of Pennsylvanian age Coals |
1979 |
| details |
Middle Pennsylvanian |
|
Indiana |
Dimichele,W.A. et al. Lycopods of Pennsylvanian age Coals |
1979 |
| details |
Westphalian B |
|
Poland |
DybovЎ-Jachowiczowa,S. et al. Preliminary note on revision of Carboniferous megaspores with Gula. Principles of the classification. |
1979 |
| details |
Early Mississippian |
|
Ohio |
DybovЎ-Jachowiczowa,S. et al. Preliminary note on revision of Carboniferous megaspores with Gula. Principles of the classification. |
1979 |
| details |
Middle Pennsylvanian |
|
Illinois |
Gastaldo,R.A. An ultrastructural and taxonomic study of Valvisporites auritus (Zerndt) Bhardwaj, a lycopsid megaspore from the Middle Pennsylvanian of southern Illinois. |
1981 |