Homo habilis has a rounded occipital, no transverse torus, a relatively high and think skull, a small brain volume, large teeth, and molars that increase towards the back of the jaw. Homo erectus has a flexed occipital, a transverse torus, a relatively low and thick skull, a small-medium brain volume, large teeth, and a varying molar gradient. Homo floresiensis has a flexed occipital, a transverse torus, a relatively low and thick skull, a small brain volume, small teeth, and molars that decrease towards that back of the jaw. Homo naledi has a flexed occipital, a transverse torus, a relatively high and thin skull, a small brain volume, small teeth, and molars that increase towards the back of the jaw.