Biological taxa that first appeared during the Silurian Period, the geologic time between 443.8 and 419.2 million years ago, during the Paleozoic Era.
Subcategories
This category has the following 6 subcategories, out of 6 total.
Pages in category "Silurian first appearances"
The following 95 pages are in this category, out of 95 total. This list may not reflect recent changes.