| original |
Late Anisian |
|
USSR(Kazakh SSR) |
Kotzur,Kh. et al. Megaspores of the Triassic Gemmanella Layers of the South-Western Part of the northern Caspian Plain and their stratigraphic significance |
1976 |
| details |
Nd |
|
Nd |
Boersma,M. et al. Triassic palynomorphs, index to genera and species |
1987 |
| details |
Late Anisian |
|
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Late Anisian |
|
USSR(Kazakh SSR) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |