torsion
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 14:29, 10 September 2013 by Andreas Plank (Talk | contribs) (1 revision: noun simple (largest file 2.4MB))
torsion (noun; Latin torquere, to twist): 1. Spiral bending; twisting.
2. (Mollusca: Gastropoda) The theory in ancestral gastropods that a 180-degree counterclockwise twisting occurred that caused the crossing of the pleural-visceral connectives in the nervous system to form a figure eight
See also: chiastoneury, detorsion.
