| original |
Famennian |
|
Canada(NWT,Mackenzie) |
Chi,B.I. et al. Stratigraphic and paleoenvironmental significance of Upper Devonian megaspores, Type Section of the Imperial Formation, Northwet Territories, Canada. |
1974 |
| original |
Visean |
|
Australia(Queensland) |
Playford,G. Lower Carboniferous megaspores from the Clarke River Basin, North Queensland, Australia. (In: Studies in Palaeobotany and Palynology in Honor of N.F.Hughes. D.J.Batten and D.E.G.Briggs, editors) |
1986 |
| original |
Middle Tournaisian |
|
China(Kiangsu) |
Chen,Y.-X. et al. A Complementary study on megaspores from Devonian - Carboniferous transition in Jurong, Jiangsu. |
1987 |