| original |
Barremian |
Aptian |
Canada(Alberta) |
Singh,C. Microflora of the Lower Cretaceous Mannville Group, east-central Alberta. |
1964 |
| details |
Barremian |
Aptian |
China(Inner Mongolia) |
Li,W.B. et al. The Early Cretaceous megaspore Arcellites and closely associated Crybelosporites microspores from northeast Inner Mongolia, P.R.China. |
1986 |
| details |
Barremian |
Aptian |
China(Inner Mongolia) |
Li,W. et al. Early Cretaceous megaspores from the Jalainor Group of northeast Inner Mongolia, P.R.China. |
1987 |
| details |
Barremian |
Aptian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Late Berriasian |
Aptian |
Canada(Alberta) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |