| details |
Late Devonian |
|
Canada(Quebec) |
Hemsley,A.R. The ultrastructure of the exine of the megaspores in two Paleozoic seed-likestructures |
1990 |
| details |
Early Westphalian B |
|
England(Yorkshire) |
Hemsley,A.R. et al. Ultrastructure and relationships of Upper Carboniferous spores from Thorpe Brickworks, West Yorkshire, United Kingdom. |
1991 |
| details |
Late Devonian |
|
Canada(Quebec) |
Chaloner,W.G. et al. Heterospory: Cul-de-Sac or pathway to the seed? (In: Pollen and Spores, Patterns of Diversification. S.Blackmore and S.H.Barnes, editors) |
1991 |
| details |
Late Devonian |
|
Canada(Quebec) |
Edwards,D. et al. In situ, pollen and spores in plant evolution. 14A -Review of in situ, spores in early land plants. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Frasnian |
|
Canada |
Scott,A.C. et al. Paleozoic spores and pollen. Chapter 18G Palaeozoic megaspores. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |