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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 |
| DETORSION | [need definition]. See also: TORSION. | |
| TORSION | The displacement of the MANTLE-and-shell from the enclosed VISCERAL MASS, rotating by growth stages in a flat or extended helix, and accompanied by the cessation of development of one-half of many of the paired organs in the soft parts; see also: DETORSION; GARSTANG'S THEORY. | |
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