| original |
Valanginian |
|
England |
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 |
| details |
Valanginian |
|
England |
Fensome,R.A. Taxonomy and biostratigraphy of Schizaealean spores from the Jurassic-Cretaceous boundary beds of the Aklavik Range, District of MacKenzie |
1987 |
| details |
Hauterivian |
Barremian |
China(Heilungkiang) |
Li,W.-B. Early Cretaceous spore-pollen assemblages from eastern Heilongjiang |
1992 |