Category:Cambrian Series 2 first appearances

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Handwiki book24.pngBiology portal

Here is a list of articles in the category Cambrian Series 2 first appearances of the Biology portal. This category includes biological taxa of rank more inclusive than genus that evolved during the Second Cambrian epoch of geologic time, between 521 and 509 million years ago, as well as genera and species that evolved during this time and persisted across multiple geological epochs.

See also: Wikipedia:WikiProject Paleontology