| original |
Middle Devonian |
Late Devonian |
Illinois |
Guennel,G.K. Devonian spores in a Middle Silurian Reef. |
1963 |
| details |
Devonian |
|
Illinois |
Smith,A.H.V. Genus Verrucosisporites, Ibrahim,1933, emend. |
1971 |
| details |
Early Frasnian |
|
S.Ireland(Kerry) |
Higgs,K.T. et al. Upper Devonian microfloras from southeast Iveragh, County Kerry, Ireland. |
1981 |
| details |
Eifelian |
Givetian |
Canada(Arctic) |
McGregor,D.C. et al. Middle Devonian miospores from the Cape de Bray, Weatherall, and Hecla Bay Formations of northeastern Melville Islad, Canadian Arctic. |
1982 |