Origin of gill arch
Examples from the Web for gill arch
On the three bones forming the first gill-arch are attached numerous appendages called gill-rakers .A Guide to the Study of Fishes, Volume 1 (of 2)|David Starr Jordan
Von Baer also confirmed Rathke's discovery of the operculum, assigning it, however, to the second gill-arch.
Note the gill-rakers, short and blunt, on the first gill-arch.Elementary Zoology, Second Edition|Vernon L. Kellogg
Huschke was indeed the first to suggest that both upper and lower jaws were formed in the first gill-arch.