Pureblood Sontaran

The Pureblood Sontarans were a group of Sontarans who were natural-born members of their species and did not take part in their races mass cloning techniques.

History
A colony of Purebloods were convinced by the Rutan Host that their kind had abandoned them and had plans to subjugate them. Angered, this colony of Purebloods attempted to exterminate their clone relatives until the Doctor showed them that they were only being used by the Rutans, who planned to kill the remaining Purebloods once they had accomplished their goal. (DWM: Pureblood)