An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

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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