| original |
Namurian A |
Namurian C |
England(Derbyshire) |
Neves,R. Namurian plant spores from the Southern Pennines, England |
1961 |
| details |
Pennsylvanian |
|
Illinois |
Peppers,R.A. et al. A comparison of the floras of the Colchester (No.2) Coal and Francis Creek Shale. (In: Depositional environments in parts of the Carbondale Formation: Western and northern Illinois) |
1970 |
| details |
Nd |
|
Nd |
Hart,G.F. et al. The "Hymenate" miospore Zonotriletes psilopteris, and its inclusion in a new genus, Psilohymena. |
1973 |
| details |
Nd |
|
Nd |
Ravn,R.L. Paleobotanical relationships and stratigraphic importance of the Carboniferous miospora genus Vestispora and questionably allied genera |
1983 |