Kellerun
The Kellerun were a humanoid species native to the Alpha Quadrant. 

In 2370, the war between the Kellerun and their neighboring enemies, the T'Lani, had just ended. The war had been marked by the use of a deadly chemical, known as the Harvester weapon. Both sides were determined to keep the hard fought peace they now enjoyed and decided to remove all records of the virus. This meant killing the scientists who designed it and two Starfleet officers, Chief Miles O'Brien and Doctor Julian Bashir, from Deep Space 9, who had been sent to help to destroy the last vials of the virus. Fortunately, the two were rescued by the crew of Deep Space 9 before the T'Lani and the Kellerun could kill them. ()

Individuals 
 Sharat
 List of unnamed Kelleruns

Technology 
 Kellerun phaser rifle

Appendices

Background information 
According to the script, the species' name was pronounced as "KELL-er-un". 

The same script decribed "In looks only, the T'Lani should be to the Kelleruns like the Vulcans are to the Klingons … the T'Lani look like the more peaceful race." 

According to StarTrek.com, this species was native to the Alpha Quadrant.

External link 
 

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Species