Sphaeroidina variabilis
- Citations total:
- 2
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| details | Middle Oligocene | USSR(Ukrainian SSR) | Shchekina,N.A. Results of spore And-pollen investigation of the Middle Maikop deposits of the South of the Ukraine | 1969 | |
| details | Late Oligocene | USSR(Ukrainian SSR) | Shchekina,N.A. Results of spore And-pollen investigation of the Middle Maikop deposits of the South of the Ukraine | 1969 |