| original |
Early Pennsylvanian |
|
Michigan |
Arnold,C.A. Megaspores from the Michigan Coal Basin. |
1950 |
| details |
Carboniferous |
|
Nd |
Potonie,R. On the paleobiology of the Carboniferous plant world. Ecological evidence of the Coal flora on the Coal Biogeny. |
1953 |
| details |
Early Pennsylvanian |
|
Michigan |
Potonie,R. et al. The spore dispersae of the Rhur Carboniferous, their morphography and stratigraphy with reviews of species of other areas.Part 2 |
1956 |
| details |
Middle Pennsylvanian |
|
Illinois |
Winslow,M.R. Upper Mississippian and Pennsylvanian megaspores and other plant microfossils from Illinois. |
1959 |
| details |
Paleozoic |
|
Nd |
Krassilov,V.A. Types of palaeofloristic successions and their causes. |
1969 |
| details |
Westphalian A |
Stephanian |
Europe |
DybovЎ-Jachowiczowa,S. et al. Revision of the Carboniferous megaspores with Corona. |
1977 |
| details |
Westphalian A |
Stephanian |
Europe |
DybovЎ-Jachowiczowa,S. et al. Revision of the Carboniferous megaspores with Corona. |
1977 |