lepidosiren also possesses four key morphological and functional specializations of the feeding mechanism : 1 ) tooth plates , 2 ) an enlarged cranial rib serving as a site for the origin of muscles depressing the hyoid apparatus , 3 ) a depressor mandibulae muscle , apparently not homologous to that of amphibians , and 4 ) a complex sequence of manipulation and chewing of prey in the oral cavity prior to swallowing .
C0024888
chewing
C0226896
oral cavity