| details |
Campanian |
Maastrichtian |
Nd |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| details |
Cretaceous |
|
Nd |
Hall,J.W. et al. Ariadnaesporites and Glomerisporites, two Cretaceous megaspores of possible Salviniaceous affinity. |
1972 |
| original |
Campanian |
|
Montana |
Hall,J.W. Studies on fossil Azolla |
1969 |
| details |
Campanian |
Maastrichtian |
Nd |
Hall,J.W. Cretaceous Salviniaceae. |
1974 |
| details |
Nd |
|
Nd |
Collinson,M.E. Diversification of modern Heterosporous Pteridophytes. (In: Pollen and Spores, Patterns of Diversification. S.Blackmore and S.H.Barnes, editors) |
1991 |
| details |
Nd |
|
Nd |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Nd |
|
Nd |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |