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 gill arch skeleton of flatfishes comprises the following components: three pairs of hypobranchials, five pairs of ceratobranchials of which the 5th pair on the floor of the pharynx is tooth-bearing, four pairs of epibranchials and four pairs of pharyngobranchials of which the 2nd, 3rd and 4th in the roof of the pharynx support a triad of tooth-bearing bony plates (Frame et al.
Miyake T, McEachran JD (1991) The morphology and evolution of the ventral gill arch skeleton in batoid fishes (Chondrichthyes: Batoidea).
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.