An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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by Paul S. Mikkelsen |
Term | Definition |
FREE | Refers to a shell which is not ATTACHED (e.g., to substrate); see also: VALVE, FREE. | |
FREE EDGE | The outer margin or OUTER APERTURAL LIP of a gastropod shell. | |
FREE VALVE | In attached bivalves, the valve which is not attached to the substrate; = UPPER VALVE. | |
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