Jophur found the proto-Sarrphor half a million years ago in fresh-water swamps. Though lacking sapiency and technology they had developed a complicated caste system with the strongest family assuming a caliphate. The Jophur left this system in place.

Sarrphor are 2,5 meter tall centauroids whose eyestalks roate independently, registering mostly infrared. The brain is not covered by a skull, but sits on a tray-like frame covered with tendons. Two flexible boneless arms end in pincers with fine-manipulation cilia.

Currently the Sarrphor are diligent clients, but history tells us the Jophur have had to renegotiate their patron-client relationship at least twice.

Sources: Contacting Aliens, An Illustrated Guide to David Brin's Uplift Universe,