| Term | Definition |
| SPIRAL GROOVE |
A GROOVE that encircles the spire of a shell. Revolving grooves going in the direction of the turning of the whorls. Coarser than a
SPIRAL THREAD. Photo by Marlo F. Krisberg; Echinolittorina riisei (Mörch, 1876). |
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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 |
| SPIRAL GROOVE |
A GROOVE that encircles the spire of a shell. Revolving grooves going in the direction of the turning of the whorls. Coarser than a
SPIRAL THREAD. Photo by Marlo F. Krisberg; Echinolittorina riisei (Mörch, 1876). |
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| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |