|
An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
|||
| by Paul S. Mikkelsen | |||
|
|
|
| Term | Definition |
| CARDINAL COSTA | Ridge or rib demarcating cardinal area from outer surface of shell. | |
| COSTA (pl. COSTAE) |
A round-topped sculptural element, stronger than a cord, usually formed by periodic thickening of the outer lip in gastropods. Moderately broad and prominent elevation of surface of shell, directed radially or otherwise; see also: COSTELLA. | |
| COSTATE |
Having rib-like AXIAL sculptural elements. See illustration: Composite Gastropod and Composite Bivalve. |
|
| INTERCOSTAL | Of or in the spaces between ribs or COSTAE. | |
| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |