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

by Paul S. Mikkelsen

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Term Definition

ACCESSORY PLATE   A secondary CALCAREOUS structure formed in some bivalves (e.g., the Pholadidae) to protect the soft parts; see also: HYPOPLAX; MESOPLAX; METAPLAX; PROTOPLAX; SIPHONOPLAX.

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