They were "tough food" specialists. They possessed massive, thickly enameled molars, premolars, and deep, broad jaws designed to grind tough plant materials like roots, seeds, and tubers.
Despite their robust heads, their bodies were relatively small (roughly 3-4 feet tall). Males were significantly larger than females. australopithecus robustus
They are known for their "dish-shaped" faces, large zygomatic arches (cheek bones) for jaw muscle passage, and a sagittal crest —a ridge on top of the skull to anchor powerful chewing muscles. They were "tough food" specialists