gill pouch


Also found in: Dictionary.

gill pouch

outgrowths of the pharynx in early embryos that give rise to gills in fish and in amphibian larvae. In higher vertebrates, they usually disappear in further development.
References in periodicals archive ?
It is further characterized by the combination of the following characters: slime pores--prebranchial 18, branchial 12, trunk 70, caudal 19, total 119; gill pouches (GP) and gill apertures (GA) 12, PCD widely separated from the opening of posterior left GAs; multicusps in anterior row 3 and multicusps in posterior row 2, total cusps 46; paired dorsal nasal sinus papillae; eyespot absent; body coloration pink.
strickrotti resembles 11 of the remaining 24 species of Eptatretus by the 3/2 multicusp configuration, but it differs from all these by the more numerous gill pouches (12 vs.
= Paramyxine; NSP = nasal sinus papillae; GP = gill pouches; DM = dental muscle; ABA = afferent branchial arteries; MVA = median ventral aorta; VA = ventral aorta; PCD = pharyngocutaneous duct; GA = gill apertures; VFF = ventral fin fold.