ossicles
Small, hard plates and projections of the internal gastric skeleton of decapod crustaceans; serve in part for attachment of muscles that move the foregut [Bliss, 1982].
(Order Decapoda):
One in a complex of rigid, plate-like structures associated with wall of cardiac stomach and, to a lesser extent, with pyloric stomach. Serves as site of attachment of muscles operating gastric mill or gives rise to tooth-like projections [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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