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

by Paul S. Mikkelsen

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Search results for:   UMBILICUS       2 terms were found.

Term	Definition

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PSEUDOUMBILICUS		An opening formed by the distal portions of the canals of previous varices that are arranged obliquely but adjacent to one another to form an UMBILICUS-like pit (as in the Muricidae). See illustration: Composite Gastropod.

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UMBILICUS		The open AXIS of a LOOSELY COILED spiral gastropod shell. See illustration: Composite Gastropod. See also: PSEUDOUMBILICUS; PHANEROMPHALOUS; OMPHALOUS; ANOMPHALOUS.

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