dilator operculi
a muscle originating on the sphenotic posterior to the levator hyoideus and inserting on the dorsal medial surface of the operculum

Dictionary of ichthyology. 2009.

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  • levator operculi — a muscle just posterior to the dilator operculi originating from the dermal pterotic bone and inserting to the dorsal medial surface of the operculum. It functions to rotate the operculum dorsally and caudally. This rotation is translated to… …   Dictionary of ichthyology

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