gill arch skeleton

gill arch skel·e·ton

cartilages associated with the visceral portion of the embryonic mammalian chondrocranium, representing the gill arch (branchial) skeletons as seen in shark-type fishes; they are the primordia of Meckel cartilage, the styloid, hyoid, cricoid, thyroid, and arytenoid cartilages, and the auditory ossicles.
See also: branchial arches.
References in periodicals archive ?
The research also showed for the first time that the gill arch skeleton of embryonic skates (a living relative of sharks that has gill rays) responds to treatment with the vitamin A derivative retinoic acid in the same way a limb or fin skeleton does, by making a mirror image duplicate of the structure as the embryo develops.