The Xindi species closest to humans in appearance, valued as scientists and engineers, whose council member Degra designs the weapon intended to destroy Earth.
The Xindi-Primates are one of the five surviving species of the Xindi, featured throughout the third season of Enterprise. They resemble humans apart from ridged cheekbones and foreheads, and they hold two of the seats on the governing Xindi Council.
Primates are known for technical skill. Degra, the most prominent of them, leads the design of both the prototype probe that kills seven million people on Earth and the larger weapon that follows. He does so in the belief, planted by the Sphere-Builders, that humanity will one day wipe out his people.
Archer works on Degra by trickery in Stratagem and later with evidence, and wins his trust. Degra brings Archer before the Council and is murdered by the Reptilian commander Dolim for it. The Primates then side with humanity in the pursuit of the stolen weapon.