| details |
Liassic |
|
W.Germany |
Petrosyants,M.A. et al. Characteristic and correlative Gymnosperm pollen Taxa, (Late Cretaceous-Paleogene) Cheirolepidiacea pollen. Synopsis. |
1983 |
| details |
Kimmeridgian |
Hauterivian |
Canada(NWT,Mackenzie) |
Fensome,R.A. Miospores from the Jurassic-Cretaceous boundary beds, Aklavik Range, Northwest Territories, Canada. (Incorporating taxonomic reviews of several Groups of Mid-Late Mesozoic miospores) |
1983 |
| original |
Nd |
|
Nd |
Pflug,H.D. Origin and development of the angiosperm pollen in earth history |
1953 |