But while the line was intact this inbreeding caused this royal family to exhibit a number of peculiar physical traits especially one known as the habsburg jaw.
Modern habsburg jaw.
Prognathism also known as the habsburg jaw is a positional relationship of the mandible or maxilla to the skeletal base where either of the jaws protrudes beyond a predetermined imaginary line in the coronal plane of the skull.
It is characterized by a jutting lower jaw that is often accompanied by an abnormally thick lower lip and sometimes a tongue that is abnormally large.
The family in question is the habsburgs.
The researchers were interested in mandibular prognathism perhaps better known as the famous habsburg jaw this was a facial deformity that affected some of the habsburgs notably including king.
Also called the habsburg lip and the austrian lip the habsburg jaw is a physical condition known by the modern term mandibular prognathism.
The researchers led by geneticist román vilas from spain s.
The most salient indicator of the family s inbreeding the habsburg jaw is what doctors refer to as mandibular prognathism.