The hyomandibula, commonly referred to as hyomandibular [bone] (os hyomandibulare, from hyoeides, `upsilon-shaped` (υ), and Latin: mandibula, `jawbone`) is a set of bones that is found in the hyoid region in most fishes. It usually plays a role in suspending the jaws and/or operculum (teleostomi only). It is commonly suggested that in tetrapo...