| details |
Oligocene |
|
USSR(Tadzhik SSR) |
Penkova,A.M. The distribution of Ephedra L. pollen in the Upper Paleogene and Neogene deposits of Southwest Tadzhikistan. |
1971 |
| details |
Middle Eocene |
|
Colorado |
Krutzsch,W. Atlas of the Middle and Upper Tertiary dispersed spores and pollen as well as the mikroplankton forms of northern central Europe. VII: Monoporate, monocolpate, longicolpate dicolpate an dephedroide (polyplicate) pollen forms. |
1970 |
| original |
Late Eocene |
Early Oligocene |
USSR(WSL) |
Shakhmundes,V.A. New Ephedra L.Species of Paleogene deposits in North Western Siberia |
1965 |