A segment in the hyoidean arch between the epihyal and tympanohyal[biology-online]. The interhyal is a small rod-like element that connects the ventral and dorsal parts of the hyoid arch. It articulates laterally with the posterior end of the epihyal and medially at the cartilaginous junction between the hyomandibula and the symplectic. It remains cartilaginous in adult zebrafish and other cypriniforms[ZFA]. [ http://www.biology-online.org/dictionary/Stylohyal ]