Councilor Tenebris was an orangutan leader of Ape City. Forty years before Taylor's arrival, Tenebris destroyed a scroll from Mount Lam which held evidence of the true history of humanity. Twenty years on, Tenebris and his protégé Ursus were behind the ruthless attempts to stifle any challenge to traditional values, which included the murders of Doctor Cato and of Councilor Quintessa. Tenebris arranged for Aleron to be convicted of murder and sent to the ape prison of The Reef, and he told Zaius the truth about man's past. Cato's study subject, the human Tern, ultimately killed Tenebris after Aleron found himself unable to, but both Tern and Aleron were then swept downriver and assumed dead.
- Tenebris is exclusive to the continuity of the Planet of the Apes comic books published by BOOM! Studios.