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Home > eBooks > Thomas Say Proceedings > Studies on Hemipteran Phylogeny > Ventral Nerve Ganglia Coalescence in the Embryo: A Feasible Character for Reconstructing the Phylogeny of Heteroptera–Paraneoptera
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Ventral Nerve Ganglia Coalescence in the Embryo: A Feasible Character for Reconstructing the Phylogeny of Heteroptera–Paraneoptera
Book: Studies on Hemipteran Phylogeny
Editor(s): Carl W. Schaefer
Chapter Author(s): Hajime Mori
Print Publication Date: 1996
https://doi.org/10.4182/AMYC5234.1996.234
Abstract

The degree of coalescence of the ventral nerve cord in heteropterans strongly suggests a correlation with their infraorder. Gerromorphans have the greatest coalescence, and pentatomomorphans and the one leptopodomorphan studied have the least; several degrees of coalescence occur in Nepomorpha. It is suggested that a high degree of coalescence allows the nymph to be active immediately upon hatching from the egg.
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