| original |
Cenomanian |
|
Minnesota |
Pierce,R.L. Lower Upper Cretaceous plant microfossils from Minnesota. |
1961 |
| details |
Cenomanian |
|
Minnesota |
Zavada,M.S. Angiosperm origins and evolution based on dispersed fossil pollen ultrastructure. (In: Historical Perspectives of Angiosperm Evolution.) |
1984 |
| details |
Early Cretaceous |
|
China(N.China) |
Miao,S. et al. Spores and pollen. Mesozoic spores and pollen. (In: Paleontological Atlas of North China.III.Micropaleontological Volume.) |
1984 |
| details |
Late Albian |
Turonian |
Greenland |
Koppelhus,E.B. et al. A palynological and sedimentological study of Cretaceous floodplain deposits of the Atane Formation at Skansen and Igdlunguaq, Disko, West Greenland. |
1993 |
| details |
Cretaceous |
|
Nd |
Osborn,J.M. et al. Comparative ultrastructure of fossil gymnosperm pollen and its phylogenetic implications. (In: Ultrastructure of Fossil Spores and Pollen. M.H.Kurmann and J.A.Doyle, editors) |
1994 |