Biological taxa that first appeared during the Santonian age of geologic time, between 86.3 and 83.6 million years ago.
Subcategories
This category has the following 3 subcategories, out of 3 total.
E
S
Pages in category "Santonian first appearances"
The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes.