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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 |
| COLUMELLA | A pillar surrounding the AXIS around which the shell is coiled, formed by the inner surface of the WHORL; the wall opposite the outer APERTURAL LIP. See illustration: Composite Gastropod. See also: AXIS; PILLAR. | |
| COLUMELLA, STRAIGHT | [need definition]. | |
| COLUMELLA, TRUNCATE | [need definition]. | |
| COLUMELLAR | Pertaining to the COLUMELLA. | |
| COLUMELLAR CALLUS | A smooth, shelly layer extending over the COLUMELLAR area, secreted by the mantle; see also: PARIETAL CALLUS. | |
| COLUMELLAR FOLD | A raised ridge on the COLUMELLA that follows the helical growth pattern of a gastropod shell.; see also: FUNICLE. | |
| COLUMELLAR LIP | The part of the inner lip, of a gastropod shell, nearest to the axis of coiling, and comprising the visible part of the COLUMELLA. | |
| COLUMELLAR PLAIT | [need definition]. See illustration: Composite Gastropod. | |
| COLUMELLAR PLICAE | [need definition]. See illustration: Composite Gastropod. | |
| COLUMELLAR TOOTH | A sharply raised projection, emanating from the COLUMELLA and protruding into the APERTURE of a GASTROPOD. See illustration: Composite Gastropod. | |
| COLUMELLAR WALL | Surface of the COLUMELLA. | |
| LIP, COLUMELLAR | The lower portion of the INNER APERTURAL LIP; see also: LIP, PARIETAL. | |
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