An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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by Paul S. Mikkelsen |
Term | Definition |
IMPERFORATE | Not open or perforated; often said of a closed UMBILICUS; see also: PERFORATE. | |
PERFORATE | Having a minute opening at the base of the shell; see also: IMPERFORATE; UMBILICATE. | |
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