| details |
Givetian |
|
Belgium |
Leclercq,S. et al. A study of the fructification of Milleria (Protopteridium) thomsonii Lang from the Middle Devonian of Belgium. |
1971 |
| details |
Middle Devonian |
|
Belgium |
Potonie,R. Examples of the natural system of spores, a supplement to the synopsis of the Sporae in situ, 1963 and the research reports from 1965,1967, and 1970 and to the phylogenetic sporolog 1973 |
1975 |
| details |
Devonian |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Devonian |
|
Germany |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Devonian |
|
Belgium |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |