Alphaurian

The Alphaurians are a race or culture from Alpha Centauri. In their operas they are known to sing between the keys. (TOS comic: "Furlough to Fury")

The comic suggests the Alphaurians are a culture of Alpha Centauri along with the Xanathians, it is unclear if both are cultures or subspecies or what exactly their relation to the human Alpha Centaurans is.