| details |
Late Albian |
Cenomanian |
Iowa |
Ravn,R.L. et al. The palynostratigraphy of the Dakota Formation, (?Late Albian-Cenomanian) in its type area, northwestern Iowa and northeastern Nebraska, USA. |
1995 |
| details |
Aptian |
Santonian |
North America |
Lupia,R. Discordant morphological disparity and taxonomic diversity during the Cretaceous angiosperm radiation: North American pollen record. |
1999 |
| details |
Barremian |
Aptian |
Portugal |
Friis,E.M. et al. Fossil floral structures of a basal angiosperm with monocolpate, reticulate-acolumellate pollen from the Early Cretaceous of Portugal. |
2000 |
| details |
Nd |
|
Nd |
Ibrahim,M.I.A. New angiosperm pollen from the upper Barremian - Aptian of the Western Desert, Egypt. |
2002 |