Biological taxa that first appeared during the Early Devonian epoch, the geologic time between 419.2 and 393.3 million years ago, during the Devonian Period.
Subcategories
This category has the following 3 subcategories, out of 3 total.
Pages in category "Early Devonian first appearances"
The following 78 pages are in this category, out of 78 total. This list may not reflect recent changes.