Final answer:
Genus Paranthropus differs from genus Australopithecus in the robustness of their cranial and dental features. Paranthropus had a more muscular build, taller stature, and larger grinding teeth compared to Australopithecus.
Step-by-step explanation:
The main feature that differentiates genus Paranthropus from genus Australopithecus is the robustness of their cranial and dental features. Genus Paranthropus had a more muscular build, stood taller, and had larger grinding teeth compared to the slender build and softer food diet of genus Australopithecus. The molars of Paranthropus also showed heavy wear, indicating a coarse and fibrous vegetarian diet. While Australopithecus is considered an ancestral species to modern humans, Paranthropus is not thought to have left any descendants.