Category:Extant Ordovician first appearances

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This category includes biological taxa that evolved during the Ordovician period of geologic time, between 485.4 and 443.8 million years ago and have not yet gone extinct.

See also the preceding Category:Extant Cambrian first appearances and the succeeding Category:Extant Silurian first appearances

This category currently contains no pages or media.

Retrieved from "https://mdwiki.org/wiki/Category:Extant_Ordovician_first_appearances"