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

by Paul S. Mikkelsen

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Search results for:   UMBONAL FOLD       1 term was found.

Term	Definition

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UMBONAL FOLD		In pectinoid shells, the ridge originating at the UMBO and setting off the body of the shell from the AURICLE.

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Over 1700 Terms in the Glossary!