Mushroom body evolution demonstrates homology and divergence across Pancrustacea
AffiliationUniv Arizona, Sch Mind Brain & Behav, Dept Neurosci
MetadataShow full item record
PublisherELIFE SCIENCES PUBLICATIONS LTD
CitationNicholas James Strausfeld, Gabriella Hanna Wolff, & Marcel Ethan Sayre. (2020, March 3). Mushroom body evolution demonstrates homology and divergence across Pancrustacea. Retrieved April 8, 2020, from eLife website: https://elifesciences.org/articles/52411
RightsCopyright © Strausfeld et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.
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AbstractDescriptions of crustacean brains have focused mainly on three highly derived lineages of malacostracans: the reptantian infraorders represented by spiny lobsters, lobsters, and crayfish. Those descriptions advocate the view that dome- or cap-like neuropils, referred to as 'hemiellipsoid bodies,' are the ground pattern organization of centers that are comparable to insect mushroom bodies in processing olfactory information. Here we challenge the doctrine that hemiellipsoid bodies are a derived trait of crustaceans, whereas mushroom bodies are a derived trait of hexapods. We demonstrate that mushroom bodies typify lineages that arose before Reptantia and exist in Reptantia thereby indicating that the mushroom body, not the hemiellipsoid body, provides the ground pattern for both crustaceans and hexapods. We show that evolved variations of the mushroom body ground pattern are, in some lineages, defined by extreme diminution or loss and, in others, by the incorporation of mushroom body circuits into lobeless centers. Such transformations are ascribed to modifications of the columnar organization of mushroom body lobes that, as shown in Drosophila and other hexapods, contain networks essential for learning and memory.
NoteOpen access journal
VersionFinal published version
Except where otherwise noted, this item's license is described as Copyright © Strausfeld et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.