Theropithecus brumpti (T. brumpti) was a large, terrestrial monkey, which lived in the mid to late Pliocene. It is an extinct species of papionin.This fossil primate is mostly known from skulls and mandibles found in Pliocene deposits excavated in the Shungura Formation, at the Omo River, Ethiopia. Both T. brumpti, and its cousin, the extant gelada (T. gelada), were related to the baboon.