Category:Oligocene first appearances
Here is a list of articles in the category Oligocene first appearances of the Biology portal. Biological taxa that first appeared during the Oligocene epoch, between 33.9 and 23 million years ago during the Early/Lower Paleogene period.
This category has only the following subcategory.
- ► Rupelian first appearances (9 P)
Pages in category "Oligocene first appearances"
The following 8 pages are in this category, out of 8 total.