|Degra, a Xindi-Primate in 2154|
|The second Xindi-Primate councilor in 2154|
The Primates, more than any other Xindi species, resembled Humans. They had, like all Xindi, distinctive ridges on their cheek bones. They also had larger foreheads. Like Humans, the Primates had variations in skin tone. They had no eyebrows.
They were also the most intellectual species of Xindi and therefore one of their own, Degra, was assigned to develop the weapon to destroy Earth. However, this intelligence also helped in convincing Degra that the Guardians' promises were empty.
|Aquatic • Arboreal • Avian • Insectoid • Primate • Reptilian|
Following approval of the facial design for the Xindi-Reptilians, the makeup for the Xindi-Primates began to be designed. This turned out to be a fairly easy job, as it had already been decided that a common feature among the Xindi was to be spiky cheek-ridges.
For the typical Primate head design, the hairline was raised, in an effort to make the aliens look significantly different from how extraterrestrials on the show commonly looked; hair designer Michael Moore also tried out various hairstyles for the Primates in a series of concept sketches. "Somewhere in the work I just decided to try to bring the spots down lower and then blend it in with the rest. And so I sent that, along with the other drawings I had, to Rick [Berman] – and the envelope came back to me with a big check on that one," recalled Moore. "Sometimes when you send 12 drawings up, you think, 'I bet he's going to go with that one' – and I had that feeling with this one."
The costumes for the Xindi-Primates were inspired by centuries-old European uniforms, as costume designer Bob Blackman was intent on making them look like "something that was a little more ancient" than the costumes for the other Xindi species. "Caucasus shapes, from Eastern Europe/Russian shapes, is where I went to get this, 16th-17th-18th century – so it's kind of like Cossack coats," Blackman explained. "But that was just in order to find something that would give them some bulk, and some strength in how they looked." (Star Trek: Communicator issue 149, p. 56)
In the novelization of "The Expanse" and "The Xindi" (entitled The Expanse), the Primates are cited as having been the second Xindi species to have evolved a very high degree of intelligence, preceded by the Xindi-Aquatics. The book also states that the Primates dominated most of the Xindi homeworld for eons, ruthlessly oppressing the other species (which they considered inferior) to the point where the others (particularly the Xindi-Reptilians and Insectoids) developed a hatred of them that remained into the 22nd century. The reason why the Primates were the Xindi species that developed the weapon is given as being that they were the most talented engineers.