The riiti was a small, grain-eating pest that inhabited Kharak. Among all of the rarified lifeforms on the desert world, only the riiti shared any DNA in common with the Kushan but also had no ancestors in the fossil record, indicating that neither were native to the world and used as one of many forms of evidence in support of the XenoGenesis Theory.
The riiti were pests that hitched a ride on colony ships like the Khar-Toba from Hiigara. After arriving on Kharak, they adapted to the environment. The entire population was likely wiped out when the Taiidan deployed the Atmospheric Deprivation Weapon into the skies of Kharak.