pharyngeal arch cartilage mandibular-hyoid median cartilage Pharyngeal arch cartilage that is a spherical mass of cartilage located between the mandibular symphysis and ventral hyoid arch. Mandibular-hyoid median cartilage is unpaired. Schaefer, S. 1990. (Anatomy and relationships of the scoloplacid catfishes. Proc. Acad. Nat. Sci. Phil. 142: 167-210) described this structure in certain catfishes and applied the name hyomandibular cartilage. To avoid possible confusion of this structure with the hyomandibular cartilage (or bone) of the suspensorium, the term mandibular-hyoid median cartilage is used here. TAO:0001989 hyomandibular cartilage sensu Schaefer (1990) teleost_anatomy