| original |
Wealden |
|
Belgium |
Delcourt,A.F. et al. Spores and pollen of the Wealdian of Hainaut. |
1955 |
| details |
Wealden |
|
Belgium |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |
| details |
Valanginian |
Hauterivian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Valanginian |
Hauterivian |
Belgium |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Nd |
|
Nd |
Batten,D.J. et al. Morphological reassessment of some zonate coronate megaspore genera of mainly post-Palaeozoic age. |
1993 |