Category:Extant Chattian first appearances

Lua error in mw.title.lua at line 392: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal'). Extant first appearances of biota during the Chattian Age. Currently extant/living (not extinct) taxa (orders, families, genera, species) that first appeared in the geologic time between 28.1 and 23 million million years ago, the Chattian age during the Paleocene Epoch of the Paleogene Period, in the Cenozoic Era.