Ctenopteris
- Citations total:
- 2
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| details | Middle Eocene | Early Oligocene | Mississippi | Frederiksen,N.O. Mid-Tertiary climate of southeastern Unites States: The sporomorph evidence. | 1980 |
| details | Middle Eocene | Early Oligocene | Alabama | Frederiksen,N.O. Mid-Tertiary climate of southeastern Unites States: The sporomorph evidence. | 1980 |