An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

  In bivalves: A projecting peg-like or finger-like structure, functioning as a support for a muscle, e.g., that serving for attachment of pedal muscle in the Pholadidae or adductor muscle in some RUDISTS; = MYOPHORE. See also: APOPHYSIS (2).

  In CHITONS, the articulating plate on valves II to VII of a chiton shell. See also: APOPHYSIS (1).

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