| original |
Campanian |
|
USSR(Urals) |
Krutzsch,W. Information on fossil dispersed tetrad pollen. |
1970 |
| details |
Early Albian |
Middle 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 |
| details |
Campanian |
|
Nd |
Schluter,T. The eoevolutionary relationship between angiosperm pollen and insects in the Late Mesozoic. |
1987 |
| details |
Cenomanian |
|
New Jersey |
Ward,J.V. et al. Possible affinites of two Triporoidate Tetrads from the Mid-Cretaceous of Laurasia |
1988 |
| details |
Middle Albian |
|
Canada(Alberta) |
Burden,E.T. et al. Palynomorphs of the Upper Blairmore Group, Southwestern Alberta |
1990 |