| details |
Middle Permian |
|
India(Bihar) |
Bharadwaj,D.C. Distribution of spores and pollen grains dispersed in the Lower Gondwana formations of India. |
1966 |
| original |
Late Emsian |
Early Eifelian |
USSR(Turkmen SSR) |
Arkhangelskaya,A.D. Spores from the Lower and Middle Devonian deposits of the Russian Platform. (In: Atlas of Spores and Pollen of Oil and Gas Bearing Deposits of the Russian and Turonskoi Platform. V.V.Menner and T.V.Byvsheva, editors) |
1985 |
| details |
Nd |
|
Nd |
Pashkevich,N.G. Morphological classification of dispersed fossil spores. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) |
1990 |