Dictionary of Ichthyology |
opercle = the principle and largest, paired dermal bone comprising the upper part of the gill cover above the subopercle. Sometimes used in aging studies. Also called operculum, q.v. |
Hyoid and opercular apparatus of Gadus, B = branchiostegals, E = os entoglossum, H = hyoid, HM = hyomandibula, I = interoperculum, O = operculum, P = preoperculum, S = suboperculum, from Kingsley's "Textbook of Vertebrate Zoology, 1906. Photograph by Brian W. Coad. |