The following are the principal traits of the kind:
Simplicity and early union of cranial sutures.
Presence of the frontal process of the temporal bone.
Wide nasal aperture, with synostosis of the nasal bones.
Prominence of the jaws.
Recession of the chin.
Early appearance, size and permanence of the “wisdom” teeth.
Unusual length of the humerus.
Perforation of the humerus.
Continuation of the “heart” line across the hand.