Mushroom body evolution demonstrates homology and divergence across Pancrustacea
Affiliation
Univ Arizona, Sch Mind Brain & Behav, Dept NeurosciIssue Date
2020-03-03
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ELIFE SCIENCES PUBLICATIONS LTDCitation
Nicholas 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/52411Journal
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Copyright © Strausfeld et al. This article is distributed under the terms of the Creative Commons Attribution License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Descriptions 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.Note
Open access journalISSN
2050-084XPubMed ID
32124731Version
Final published versionae974a485f413a2113503eed53cd6c53
10.7554/eLife.52411
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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.
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