| details |
Middle Pennsylvanian |
Late Pennsylvanian |
Illinois |
Andrews,H.N. et al. A new American species of Bowmanites. |
1951 |
| details |
Nd |
|
Nd |
Felix,C.J. Some Neglected aspects of plant microfossil research. |
1960 |
| details |
Missourian |
Virgilian |
Illinois |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Late 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 |
Pennsylvanian |
|
Illinois |
Courvoisier,J.M. et al. Correlation of spores from Pennsylvanian Coal-Ball fructifications with dispersed spores. |
1975 |
| details |
Late Pennsylvanian |
|
Ohio |
Good,C.W. Taxonomic characteristics of Sphenophyllalean Cones. |
1978 |
| details |
Westphalian D |
|
Czechoslovakia |
Storch,D. Determine of monolete spores of two Sphenophyllum -Species from the Westphalian D, Bohemia. |
1981 |