| original |
Emsian |
|
Spitsbergen |
Allen,K.C. Lower and Middle Devonian spores of North and Central Vestspitsbergen |
1965 |
| details |
Siegenian |
Eifelian |
Nd |
Chaloner,W.G. Spores and Land-Plant evolution. |
1967 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 5. Supplement to all Groups (Turmae). |
1970 |
| details |
Nd |
|
Nd |
McGregor,D.C. Lower and Middle Devonian spores of eastern Gaspe, Canada.1.Systematics. |
1973 |
| details |
Siegenian |
Eifelian |
Nd |
Kedves,M. Introduction to the palynology of Pre-Quaternary deposits |
1986 |