gill arch


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Related to gill arch: Gill raker

gill arch

(gĭl)
n.
1. One of several bony or cartilaginous arches located on either side of the pharynx and supporting the gills in fish and amphibians.
2. Embryology One of several corresponding arches in the embryo of a bird, reptile, or mammal that develop into structures of the ear and neck. In both senses also called branchial arch, pharyngeal arch.

gill arch

the cartilagenous skeleton supporting a GILL.
References in periodicals archive ?
Diagnosis: A species of Mogurnda with the following combination of characters: soft dorsal rays 11 or 12; soft anal rays 12 (rarely 11); pectoral rays 15-17, rarely 17; scales in lateral series 36-42; predorsal scales 21-25; rakers on lower limb of first gill arch usually 9 (80% of specimens with 8-9); body depth at pelvic origin 21.
00003), and number of gill rakers on the lower limb of the first gill arch (p < 0.
Gill raker counts were made on the first gill arch and include rudiments.
Leading edge of lower limb of first gill arch with 9 elongate gill rakers on each side in single cleared and stained specimen.
Although the gill rakers on the first gill arch of members of this genus often have a row of crenulations or serrations (a series of sharply rounded protrusions lacking any ossification) along their medial margins (Fig.
First gill arch usually with 8 Glossamia gill rakers; dark bars trifasciata distinct, rarely obscured by uniform dark colour, but never by mottling; dark bar below first dorsal fin wider than eye 4b.
Fin, pectoral fin rays; Sn -OV, snout to origin of ventral fin; Gill rak, number of gill rakers in first lower gill arch including one in the angle of the arch; Anus pos.
Diagnosis: Mouth moderately enlarged, upper jaw reaching to below anterior half of pupil; gill opening broad, extending forward to below posterior half of eye; lower rakers on outer face of first gill arch 15 (total rakers 18), elongate and pointed; pectoral fins 13; lateral scale count 24; transverse scale count (TRB) 7; predorsal scales 7-8; caudal peduncle relatively long and slender, the depth 2.