| details |
Early Permian |
Late Cretaceous |
Germany |
Poort,R.J. et al. Aspects of Permian palaeobotany and palynology. Xviii. on the morphology and ultrastructure of Potonieisporites novicus. (Prepollen of Late Carboniferous/Early Permian Walchiaceae) |
1997 |
| details |
Kazanian |
|
USSR(European) |
Sivertseva,I.A. On Permian vegetation of the Soviet Union. (In: On the Methods in Paleopalynological Studies.) |
1966 |
| details |
Recent |
|
Nd |
Potonie,R. Position of the Paleozoic spore genera in the natural system. |
1954 |
| details |
Early Kazanian |
|
USSR(European) |
Zoricheva,A.I. et al. Spore-pollen complexes of Upper Permian deposits of various Regions of the North of the European part of the USSR. |
1954 |
| details |
Paleozoic |
|
Nd |
Potonie,R. The spores of Palaeozoic plants in the natural (Morphologic) system |
1954 |
| details |
Nd |
|
Nd |
Pant,D.D. Suggestions for the classification and nomenclature of fossil spores and pollen grains |
1954 |
| details |
Early Gondwana |
|
India(Bihar) |
Sen,J. Principles and problems of microflora correlations of Indian Coal Seams with special reference to Karharbari Coalfield. |
1953 |