| original |
Early Devonian |
|
Canada(Ontario) |
McGregor,D.C. Spores and other plant microfossils from selected Devonian sedimentary Formations of Canada |
1957 |
| original |
Frasnian |
|
Canada(NWT,Franklin) |
McGregor,D.C. Devonian spores from Melville Island, Canadian Arctic Archipelago. |
1960 |
| details |
Givetian |
|
Canada(NWT,Franklin) |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Givetian |
|
England |
Mortimer,M.G. et al. The palynology of the Concealed Devonian rocks of Southern England. |
1972 |