Stratigraphic time
| This age is part of | |
|---|---|
| Phanerozoic | 542 - recent |
| Paleozoic | 542 - 251 |
| This age is subdivided to | |
|---|---|
| Upper Ordovician | 460.9 - 443.7 |
| Middle Ordovician | 471.8 - 460.9 |
| Lower Ordovician | 488.3 - 471.8 |
| Number of records | |
|---|---|
| Taxa | 46 |
Copyright © 1999-2013 BioLib