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Mushroom body evolution demonstrates homology and divergence across Pancrustacea
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,’ ar...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
eLife Sciences Publications, Ltd
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7054004/ https://www.ncbi.nlm.nih.gov/pubmed/32124731 http://dx.doi.org/10.7554/eLife.52411 |
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author | Strausfeld, Nicholas James Wolff, Gabriella Hanna Sayre, Marcel Ethan |
author_facet | Strausfeld, Nicholas James Wolff, Gabriella Hanna Sayre, Marcel Ethan |
author_sort | Strausfeld, Nicholas James |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-7054004 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | eLife Sciences Publications, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-70540042020-03-05 Mushroom body evolution demonstrates homology and divergence across Pancrustacea Strausfeld, Nicholas James Wolff, Gabriella Hanna Sayre, Marcel Ethan eLife Evolutionary Biology 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. eLife Sciences Publications, Ltd 2020-03-03 /pmc/articles/PMC7054004/ /pubmed/32124731 http://dx.doi.org/10.7554/eLife.52411 Text en © 2020, Strausfeld et al http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
spellingShingle | Evolutionary Biology Strausfeld, Nicholas James Wolff, Gabriella Hanna Sayre, Marcel Ethan Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title | Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title_full | Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title_fullStr | Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title_full_unstemmed | Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title_short | Mushroom body evolution demonstrates homology and divergence across Pancrustacea |
title_sort | mushroom body evolution demonstrates homology and divergence across pancrustacea |
topic | Evolutionary Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7054004/ https://www.ncbi.nlm.nih.gov/pubmed/32124731 http://dx.doi.org/10.7554/eLife.52411 |
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