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Post-canine Megadontia Compared with Modern Human Dental Morphology:

Compared to present day humans, early hominids such as Paranthropus aethiopicus and Australopithecus garhi had significantly larger dental morphology in their molars and premolars and smaller incisors. The premolars had molarized roots and the lower molars had additional capsules and thick molar enamel.

See also: One of the pivotal evolutionary features that distinguish modern day humans (Homo sapiens) from our ancestors is the https://meridian.allenpress.com/angle-orthodontist/article/49/3/153/56779/The-Human-Chin-and-Its-Relationship-to-Mandibular http://www.sciencedirect.com/science/article/pii/S0021929005002319 protruding chin.