| details |
Middle Liassic |
Late Liassic |
USSR(Siberia) |
Bogdashova,L.I. Megaspores in Early - Middle Jurassic deposits of the Siberian Platform: Their stratigraphic significance and use in tying together facially diverse sediments. (In: Material on the Biostratigraphy and Paleogeography of Eastern Siberia) |
1975 |
| details |
Hettangian |
Toarcian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Early Jurassic |
|
USSR(Siberia) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |