different between opercle vs pseudobranchia

English

Compare French opercule. See operculum.

opercle (plural opercles)

(anatomy) Any of the bony plates supporting the gill covers of fishes; an opercular bone.
(zoology) An operculum.

pseudo- +? branchia (“gill”)

pseudobranchia

(marine biology) A small patch of gill-like filaments on the inner surface of the opercle near the junction of the preopercle.

Northern Fishes; with Special Reference to the Upper Mississippi Valley, by Samuel Eddy, James Campbell Underhill. University of Minnesota Press: 1974, ?ISBN, page 85.[1]

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