pterotic
Endochondral bone that articulates with the autosphenotic anteriorly, the parietal dorsomedially, the prootic ventrally (and the intercalar occasionally), and the epiotic and exoccipital posteriorly. The pterotic encloses the horizontal semicircular canal of the inner ear. The lower edge of the pterotic contributes to the hyomandibular facet. The pterotic is paired.