It has been proposed that choristoma of the middle ear could be part of a syndrome characterized by embryonic developmental anomalies, as suggested by its frequent association with ossicular chain, facial nerve, and second branchial arch
Cetorhinus maximus is also characterized by having large gill slits that nearly encircle the head, numerous long, filamentous dermal denticle gill takers lining the anterior and posterior sides of each branchial arch
, a strongly pointed snout and large subterminal mouth with numerous small, monocuspid teeth, strong lateral keels on the caudal peduncle and a large lunate caudal fin (Compagno, 2001).
38) The 2nd branchial arch
enlarges caudally, extending toward the enlarging epicardial ridge of the 5th branchial arch
Hairy polyp' of the pharynx in association with an ipsilateral branchial sinus: evidence that the 'hairy polyp' is a second branchial arch
The anterior two thirds originate from paired lateral lingual swellings, which are contributed by first branchial arch
According to Myers, "I've done concentration series, where we give sets of embryos exposures at increasing concentrations, and we get a nice linear curve out of it: more alcohol leads to increasing frequency and severity of midline and branchial arch
Summary of soft anal rays, pectoral rays, and total gill rakers on the first branchial arch
for three species of Amphiprion.
As development progresses, the second branchial arch
proliferates caudally and encloses the second, third, and fourth branchial clefts creating an ectodermally lined cavity, the cervical sinus.
In this case, each branchial arch
was composed of a cartilaginous structure, vascular and muscle tissue supporting the branchial filaments (Figure 1).