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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
| Term | Definition |
| BOURRELET | Either of two portions of bivalve ligamental area flanking RESILIFER on its anterior and posterior sides, each comprises growth track and seat of the lamellar LIGAMENT. The posterior bourrelet is flattish in all oysters except the Exogyrinae, in which it is a narrow, sharp-crested spiral ridge on the left valve and a corresponding GROOVE on the RIGHT VALVE. | |
| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |