the different cranial kinetic systems described in birds are limited in ramphastos by the dorsal and backward position of the nostrils , the shape of the fronto-nasal suture , the lateral fit-in between nasal , lacrymal and frontal bones , and the divergent directions of the 2 otic processes of the quadrate , 5 ligaments joint the posterior skull elements to the quadrate and the mandible .
C0037303
skull
C0024687
mandible