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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
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| Term | Definition |
| SHOULDER | The portion of each whorl of a gastropod shell lying between the SUTURE and the angle, periphery, or SHOULDER margin. See illustration: Composite Gastropod. | |
| SHOULDER MARGIN | The periphery or outermost edge of a WHORL. | |
| SHOULDER SPINE | A spine at or above the SHOULDER margin. | |
| SHOULDERED | Having an angulation of the whorl at its periphery or outermost edge, even if this is indefinite, as in the case of a CONVEX profile. | |
| WHORL, SHOULDERED | Having an angulation of the whorl at its PERIPHERY or outermost edge. | |
| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |