Asphondylia websteri is distinguished from the others by the reduced number of lateral papillae on each side of the larval spatula (breastbone).
The breastbone and ribs healed rapidly and the tuberculosis of the lungs vanished all within a week or two.
Powerful muscles would have developed to anchor these limbs, which would have reacted upon the breastbone.
It is inserted into the chest through a cut above the breastbone.
The procedure begins when the surgeon makes an incision in the skin over the breastbone and divides it to expose the pericardium.
The minimally invasive approach does not involve cutting the breastbone, but instead uses multiple incisions in the side of the chest and the leg.
The skeleton's breastbone has also adapted into a large keel, suitable for the attachment of large, powerful flight muscles.
One of the most abnormal findings was the sternum (breastbone) and most parts of the frontal ribs were missing.
