| details |
Early Carboniferous |
|
Spitsbergen |
Bharadwaj,D.C. On Porostrobus zeilleri, Nathorst, and its spores with remarks on the systematic position of Porostrobus bennholdi, Bode, and the Phyogeny of Densosporites, Berry. |
1959 |
| details |
|
|
Spitsbergen |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Carboniferous |
|
Spitsbergen |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |