| details |
Paleozoic |
|
Nd |
Taylor,T.N. Pollen and pollen organ evolution in early seed plants. |
1981 |
| details |
Stephanian B |
|
Ohio |
Trivett,M.L. et al. Diversity among Paleozoic Cordaitales |
1991 |
| details |
Nd |
|
Nd |
Osborn,J.M. et al. Comparative ultrastructure of fossil gymnosperm pollen and its phylogenetic implications. (In: Ultrastructure of Fossil Spores and Pollen. M.H.Kurmann and J.A.Doyle, editors) |
1994 |
| details |
Late Carboniferous |
|
Euramerica |
Dimichele,W.A. et al. Paleobotanical and paleoecological constraints on models of Peat Formation in the Late Carboniferous of Euramerica |
1994 |
| details |
Westphalian A |
Stephanian |
Ohio |
Pryor,J.S. The Upper Pennsylvanian Duquesne Coal of Ohio (USA): Evidence for a dynamic peat-accumulating swamp community. |
1996 |
| details |
Asselian |
Early Sakmarian |
China(Shanxi) |
Wang,S.-J. et al. Cordaitalean seed plants from the Early Permian of North China. I. Delimitation and reconstruction of the Shanxioxylon sinense plant. |
2003 |