levator operculi

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 other elements in the opercular series and then to the mandible by the interopercular-mandibular ligament. The caudal pull on the ligament depresses the mandible and opens the jaws

Dictionary of ichthyology. 2009.

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Look at other dictionaries:

  • adductor operculi — a muscle originating from the pterotic bone posterior and medial to the origin of the elevator operculi and inserting on the dorso medial surface of the operculum ventral to the insertion of the levator operculi …   Dictionary of ichthyology

  • 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

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