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

by Paul S. Mikkelsen

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Term Definition

PALLIAL SINUS   A notch or EMBAYMENT in the PALLIAL LINE caused by the attachment of the siphon's retractile muscles. It may be deep, shallow, or absent... depending on the species. See illustration: Composite Bivalve. See also: INTEGROPALLIATE; SINUPALLIATE.

See: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg.

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