Category:Chattian first appearances

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First appearances of biota during the Chattian Age, the geologic time between 28.1 and 23 million million years ago, during the Oligocene Epoch of the Paleogene Period in the Cenozoic Era.

See also the preceding Category:Rupelian first appearances and the succeeding Category:Aquitanian first appearances
See also: Category: Chattian extinctions

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