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Mushroom body evolution demonstrates homology and divergence across Pancrustacea

Strausfeld, Nicholas James ; Wolff, Gabriella Hanna and Sayre, Marcel Ethan LU (2020) In eLife 9.
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... (More)

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.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
divergence, evolution, evolutionary biology, ground pattern organization, learning and memory, mushroom bodies, neuroscience, Pancrustacea
in
eLife
volume
9
publisher
eLife Sciences Publications LTD.
external identifiers
  • pmid:32124731
ISSN
2050-084X
DOI
10.7554/eLife.52411
language
English
LU publication?
yes
id
36204999-1b52-4694-8dcf-2b724f097d20
date added to LUP
2020-03-17 13:41:07
date last changed
2020-10-13 13:47:23
@article{36204999-1b52-4694-8dcf-2b724f097d20,
  abstract     = {<p>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.</p>},
  author       = {Strausfeld, Nicholas James and Wolff, Gabriella Hanna and Sayre, Marcel Ethan},
  issn         = {2050-084X},
  language     = {eng},
  publisher    = {eLife Sciences Publications LTD.},
  series       = {eLife},
  title        = {Mushroom body evolution demonstrates homology and divergence across Pancrustacea},
  url          = {http://dx.doi.org/10.7554/eLife.52411},
  doi          = {10.7554/eLife.52411},
  volume       = {9},
  year         = {2020},
}