sentients
XON

HISTORY
The Xon, along with the Centauri evolved on the same world on separate  continents. Separated by vast oceans and other land masses, both races did not contact each other until either the Xon or the Centauri developed the technology for extended sea travel. First contact was made. The initial curiosity wore off quickly. It was decided that Centauri Prime was not big enough for both species. A genocidal war ensued. The Xon lost, and are now extinct.

HOMEWORLD
Centauri Prime

NOTES
I must note that the only available information on the Xon is that related by the Centauri.