| details |
Chesterian |
|
Kentucky |
Staplin,F.L. et al. Elucidation of some Paleozoic Densospores |
1964 |
| details |
Chesterian |
|
Kentucky |
Butterworth,M.A. et al. Densosporites Berry 1937 and related genera. |
1963 |
| details |
Brigantian |
Namurian A |
Europe |
Butterworth,M.A. Upper Carboniferous. (In: Pollen and Spore Biostratigraphy of the Phanerozoic in Northwest Europe) |
1984 |
| details |
Arnsbergian |
Early Chokierian |
England(Northumberland) |
Turner,N. et al. Palynological evidence for Early Namurian age of the "Millstone Grit" and Upper Limestone Group around Longhoughton Steel, Northumberland. |
1992 |