| details |
Late Gothlandian |
|
Nd |
Allen,K.C. A review of in situ, Late Silurian and Devonian spores. |
1980 |
| details |
Whitcliffian |
Downtonian |
Wales |
Allen,K.C. A comparison of the structure and sculpture of in situ, and dispersed Silurian and Early Devonian spores. |
1981 |
| details |
Pridolian |
Gedinnian |
Nd |
Taylor,T.N. The origin of land plants |
1982 |
| details |
Lochkovian |
|
Wales |
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 |