Meaning of detorsion in English:


Pronunciation /dɪˈtɔːʃ(ə)n/


mass nounZoology
  • (in gastropod molluscs) the evolutionary reversion of a group to a primitive linear body plan.

    Compare with torsion

    ‘The latter group includes radically modified animals, the Opisthobranchia and Pulmonata, which undergo detorsion and essentially re-evolve bilateral symmetry.’
    • ‘Some species undergo reverse torsion (‘detorsion’), but evidence of having passed through a twisted phase can be seen in the anatomy of these forms.’
    • ‘The bodies of most members of this group show evidence of detorsion.’