Stratigraphic time
| This age is part of | |
|---|---|
| Phanerozoic | 542 - recent |
| Cenozoic | 65.5 - recent |
| Tertiary | 65.5 - 1.806 |
| Paleogene | 65.5 - 23.03 |
| This age is subdivided to | |
|---|---|
| Upper Oligocene | 28.4 - 23.03 |
| Lower Oligocene | 33.9 - 28.4 |
| Number of records | |
|---|---|
| Taxa | 412 |
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