Category:Early Ordovician first appearances
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Here is a list of articles in the category Early Ordovician first appearances of the Biology portal. Biological taxa that first appeared during the Early Ordovician epoch of geologic time, between 485.4 and 470 million years ago.
Subcategories
This category has only the following subcategory.
Pages in category "Early Ordovician first appearances"
The following 53 pages are in this category, out of 53 total.
