original |
Middle Pennsylvanian |
|
Kentucky |
Pigg,K.B. et al. Chaloneria, gen.nov., Heterosporous Lycophytes from the Pennsylvanian of North America. |
1983 |
original |
Middle Pennsylvanian |
|
Illinois |
Pigg,K.B. et al. Chaloneria, gen.nov., Heterosporous Lycophytes from the Pennsylvanian of North America. |
1983 |
original |
Middle Pennsylvanian |
|
Indiana |
Pigg,K.B. et al. Chaloneria, gen.nov., Heterosporous Lycophytes from the Pennsylvanian of North America. |
1983 |
details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |