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

by Paul S. Mikkelsen

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Term Definition

LIP, PARIETAL   The upper portion of the inner APERTURAL LIP, which is attached to the subsequent WHORL.

PARIETAL   Pertaining to the region of a gastropod shell that extends from the COLUMELLA posteriorly and around the curve of the shell.

PARIETAL CALLUS   Enamel on the inside of a shell just within the APERTURE of snails; see also: COLUMELLAR CALLUS.

PARIETAL DENTICLE   [need definition]; present in some Polygyridae.

PARIETAL TOOTH   A shelly projection on the PARIETAL WALL of the shell of gastropods. See illustration: Composite Gastropod. See also: PARIETAL.

PARIETAL WALL   In a gastropod, the region just above the columellar region, partly outside and partly inside the aperture; sometimes called the INNER LIP; see also: PARIETAL.

SHIELD, PARIETAL   [need definition]. See illustration: Composite Gastropod.

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