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Geolocation
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Author - title
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Year
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| details | Pennsylvanian | North America | Arnold,C.A. The fossil-plant record. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) | 1969 | |
| details | Kungurian | USSR(Russian Platform) | Abramova,S.A. et al. The problem of classifying forms of genus Vittatina, Lub., and forms with a ribbed body and air sacs. (Taxonomy and Methods for the Study of Fossl Pollen and Spores. V.N. Saks and A.F. Khlonova, editors) | 1964 |