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Operculum


Shell of a freshwater snail with the operculum in place
Shell of a freshwater snail with the operculum in place


An Operculum is a corneous or calcareous cover or lid.



In some gastropod molluscs the operculum is used to seal the shell when the animal has withdrawn inside.



In bony fish, an operculum on each side of the body protects the chamber containing the gills.



Associated Terms: Opercula, Operculums

 


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