| original |
Aptian |
Early Albian |
USA(Atlantic Coast.Pl.) |
Doyle,J.A. et al. Pollen and leaves from the Mid-Cretaceous Potomoc Group and their bearing on early angiosperm evolution. (In: Origin and Early Evolution of Angiosperms.C.B.Beck, editor) |
1976 |
| original |
Early Sabinian |
|
Georgia |
Christopher,R.A. et al. The stratigraphic and structural significance of Paleocene pollen from Warm Springs, Georgia. |
1980 |
| original |
Late Barremian |
Early Aptian |
Israel |
Brenner,G.J. Evidence for the Earliest Stage of angiosperm pollen evolution : Paleoequatorial section for Israel. (In: Flowering plant origin, evolution and Phylogeny. D.W.Taylor and L.J.Hickey, editors) |
1996 |