| original |
Desmoinesian |
|
Kansas |
Leisman,G.A. A Petrified Sporangiostrobus and its spores from the Middle Pennsylvanian of Kansas. |
1970 |
| original |
Desmoinesian |
|
Iowa |
Leisman,G.A. A Petrified Sporangiostrobus and its spores from the Middle Pennsylvanian of Kansas. |
1970 |
| details |
Pennsylvanian |
|
Louisiana |
Courvoisier,J.M. et al. Correlation of spores from Pennsylvanian Coal-Ball fructifications with dispersed spores. |
1975 |
| details |
Nd |
|
Nd |
Potonie,R. Examples of the natural system of spores, a supplement to the synopsis of the Sporae in situ, 1963 and the research reports from 1965,1967, and 1970 and to the phylogenetic sporolog 1973 |
1975 |
| details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |