| original |
Middle Pennsylvanian |
|
Illinois |
Hibbert,F.A. et al. A new Calamitalean cone from the Middle Pennsylvanian of Southern Illinois. |
1965 |
| details |
Middle Pennsylvanian |
|
USA |
Taylor,T.E. et al. Studies of spores from Carboniferous fructifications. 1. Introduction and preliminary survey utilizing the Scanning Electron Microscope. |
1969 |
| details |
Middle Pennsylvanian |
|
USA |
Taylor,T.N. et al. Preliminary study of spores from Carboniferous fructifications utilizing the Scanning Electron Microscope. |
1969 |
| details |
Middle Pennsylvanian |
|
Illinois |
Gastaldo,R.A. Palaeostrachya dircei, n.sp., an authigenically cemented Equisetalean Strobilus from the Middle Pennsylvanian of Southern Llinois. |
1981 |