orthoneury

orthoneury
n. [Gr. orthos, straight; neuron, nerve]
(MOLLUSCA: Gastropoda)
In forms with bilateral zygoneury, the condition of the visceral loop ganglia and crossed connectives indicating earlier streptoneury are still evident though sometimes reduced; see detorsion.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • detorsion — n. [L. de, away from; torquere, to twist] 1. The process of twisting back or removing torsion; unwinding. 2. (MOLLUSCA: Gastropoda) A term used to describe the reversal of torsion; see orthoneury, torsion …   Dictionary of invertebrate zoology

  • zygosis — n. [Gr. zygosis, a joining] 1. Conjugation. 2. (ARTHROPODA: Insecta) In coccids, the median lobes of the pygidium that are united basally by internal sclerotization. 3. (MOLLUSCA: Gastropoda) A neural connection between the supraintestinal… …   Dictionary of invertebrate zoology

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