| details |
Barremian |
Aptian |
Nd |
Batten,D.J. et al. Morphological reassessment of some zonate coronate megaspore genera of mainly post-Palaeozoic age. |
1993 |
| original |
Barremian |
Aptian |
Argentina(Patagonia) |
Archangelsky,S. et al. Morphology and structure of megaspores from the Cretaceous of Patagonia, Republic of Argentina. |
1990 |
| details |
Mesozoic |
|
Nd |
Kovach,W.L. A review of Mesozoic megaspore-ultrastructure. (In: Ultrastructure of Fossil Spores and Pollen. M.H.Kurmann and J.A.Doyle, editors) |
1994 |
| details |
Early Cretaceous |
|
Argentina(Santa Cruz) |
Kedves,M. Tranmission Electron Microscopy of the Fossil Spores. |
1996 |