mesocardiac ossicle
(ARTHROPODA: Crustacea)
In Decapoda, a triangular or oblong plate, the apex pointing forward maybe more or less truncated; forming the keystone of the anterior arch of the gastric mill.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • pterocardiac — adj. [Gr. pteron, wing; kardia, heart] (ARTHROPODA: Crustacea) In Decapoda, a gastric mill ossicle in the form of a curved triangular plate articulating with the mesocardiac ossicle along the broad base, with the bent apex connected to the… …   Dictionary of invertebrate zoology

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