| Term | Definition |
| PLANISPIRAL | Coiled in a single plane; loosely used also with DISCOIDAL shells having asymmetrical sides; see also: LENTICULAR. See other gastropod shapes. | |
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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
| Term | Definition |
| PLANISPIRAL | Coiled in a single plane; loosely used also with DISCOIDAL shells having asymmetrical sides; see also: LENTICULAR. See other gastropod shapes. | |
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