umbonal cavity

umbonal cavity
(MOLLUSCA: Bivalvia)
1. Part of the valve interior which lies within the umbo and under the hinge plate.
2. In oysters, that part of the left valve interior lying in the umbonal region beneath the ligamental area.

Online Dictionary of Invertebrate Zoology. . 2005.

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Look at other dictionaries:

  • pedal elevator muscle — (MOLLUSCA: Bivalvia) Muscle fibers attached in the umbonal cavity that raise the foot …   Dictionary of invertebrate zoology

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