details |
Middle Pennsylvanian |
|
Kentucky |
Pigg,K.B. et al. Megagametophyte development in the Chaloneriaceae, fam.nov., permineralized Paleozoic isoetales (Lycopsida). |
1983 |
details |
Middle Pennsylvanian |
|
Illinois |
Pigg,K.B. et al. Megagametophyte development in the Chaloneriaceae, fam.nov., permineralized Paleozoic isoetales (Lycopsida). |
1983 |
details |
Middle Pennsylvanian |
|
Indiana |
Pigg,K.B. et al. Megagametophyte development in the Chaloneriaceae, fam.nov., permineralized Paleozoic isoetales (Lycopsida). |
1983 |