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An illustration of the evolutionary process of streptoneury among gastropods. A. bilateral, B. asymmetrical, C. streptoneurous condition. The reference letters are placed upon the organs of the primitive left side. a. anus; c. cerebral ganglion; g. ctenidium; l. auricle; m. mouth; n. nephridial
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In a streptoneurous animal, the right visceral nerve becomes a supraintestinal nerve (i.e., moving up from its former position along the intestines on the right side) and the left visceral nerve becomes a subintestinal nerve (i.e., moving down below the intestines and shifting to the right).
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The extant gastropod molluscs can be described as streptoneurous. However, some lineages, especially the
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opening; o. osphradium; pa. parietal ganglion; pe. pedal ganglion; pl. pleural ganglion; v. ventricle.
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close to the animal's head. Specifically, streptoneury is the crossing of the cerebrovisceral
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Behavior and Its Neural
Control in Gastropod Molluscs
103:Hertwig, Richard; Kingsley, John Sterling (1905).
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153:The biology of terrestrial molluscs
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129:. Oxford University. p. 6.
55:in which the intestines, heart,
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47:condition present in all
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190:-related article is a
150:Barker, G. M. (2001).
123:Chase, Ronald (2002).
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156:. CABI. p. 185.
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106:A manual of zoology
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241:Gastropod anatomy
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41:chiastoneury
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65:connectives
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90:References
84:euthyneury
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