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Elife. 2017 Sep 26;6. pii: e29889. doi: 10.7554/eLife.29889.

An insect-like mushroom body in a crustacean brain.

Author information

1
Department of Biology, University of Washington, Seattle, United States.
2
Sensory Neurobiology Group, University of Queensland, Brisbane, Australia.
3
Department of Neuroscience, School of Mind, Brain and Behavior, University of Arizona, Tucson, United States.

Abstract

Mushroom bodies are the iconic learning and memory centers of insects. No previously described crustacean possesses a mushroom body as defined by strict morphological criteria although crustacean centers called hemiellipsoid bodies, which serve functions in sensory integration, have been viewed as evolutionarily convergent with mushroom bodies. Here, using key identifiers to characterize neural arrangements, we demonstrate insect-like mushroom bodies in stomatopod crustaceans (mantis shrimps). More than any other crustacean taxon, mantis shrimps display sophisticated behaviors relating to predation, spatial memory, and visual recognition comparable to those of insects. However, neuroanatomy-based cladistics suggesting close phylogenetic proximity of insects and stomatopod crustaceans conflicts with genomic evidence showing hexapods closely related to simple crustaceans called remipedes. We discuss whether corresponding anatomical phenotypes described here reflect the cerebral morphology of a common ancestor of Pancrustacea or an extraordinary example of convergent evolution.

KEYWORDS:

Neogonodactylus oerstedii; Pancrustacea; Stomatopoda; evolution; mushroom body; neural organization; neuroscience

PMID:
28949916
PMCID:
PMC5614564
DOI:
10.7554/eLife.29889
[Indexed for MEDLINE]
Free PMC Article

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