Patterns and processes of brain diversification within esociform teleosts

Sheila M. Means, Michael Lannoo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The richness of nervous systems represented by extant fishes has not yet been fully determined; the brain morphology of many groups remains undescribed. For this reason we have begun to examine the brains of esociforms, a group representing basal euteleosts, focusing here on three goals: 1) to provide the first general descriptions of the brains of two esociform teleosts, Esox masquinongy (muskellunges) and Esox lucius (northern pikes); 2) to describe the neuronal development of E. masquinongy; and 3) to compare the differences in neuronal features between E. masquinongy and E. lucius with reference to the ontogeny of E. masquinongy. We demonstrate that relative to the brains of E. lucius and other basal euteleosts, the brains of E. masquinongy exhibit several paedomorphic features involving the position and morphology of nuclei present throughout the brain. This heterochronic shift parallels differences in nonneural morphological features described between these two species. We conclude that at finer taxonomic levels in some groups such as esocids, aspects of neuronal diversification may be explained by evolutionary transformations involving all body systems.

Original languageEnglish
Pages (from-to)23-57
Number of pages35
JournalJournal of Morphology
Volume229
Issue number1
DOIs
StatePublished - 1996

Fingerprint

Esocidae
Esox lucius
brain
Brain
nervous system
ontogeny
Esox masquinongy
Nervous System
fish
Fishes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Developmental Biology
  • Anatomy

Cite this

Patterns and processes of brain diversification within esociform teleosts. / Means, Sheila M.; Lannoo, Michael.

In: Journal of Morphology, Vol. 229, No. 1, 1996, p. 23-57.

Research output: Contribution to journalArticle

@article{e3ccf57c2dbb4981aecca9e1d1e0808d,
title = "Patterns and processes of brain diversification within esociform teleosts",
abstract = "The richness of nervous systems represented by extant fishes has not yet been fully determined; the brain morphology of many groups remains undescribed. For this reason we have begun to examine the brains of esociforms, a group representing basal euteleosts, focusing here on three goals: 1) to provide the first general descriptions of the brains of two esociform teleosts, Esox masquinongy (muskellunges) and Esox lucius (northern pikes); 2) to describe the neuronal development of E. masquinongy; and 3) to compare the differences in neuronal features between E. masquinongy and E. lucius with reference to the ontogeny of E. masquinongy. We demonstrate that relative to the brains of E. lucius and other basal euteleosts, the brains of E. masquinongy exhibit several paedomorphic features involving the position and morphology of nuclei present throughout the brain. This heterochronic shift parallels differences in nonneural morphological features described between these two species. We conclude that at finer taxonomic levels in some groups such as esocids, aspects of neuronal diversification may be explained by evolutionary transformations involving all body systems.",
author = "Means, {Sheila M.} and Michael Lannoo",
year = "1996",
doi = "10.1002/(SICI)1097-4687(199607)229:1<23::AID-JMOR2>3.0.CO;2-Q",
language = "English",
volume = "229",
pages = "23--57",
journal = "Journal of Morphology",
issn = "0362-2525",
publisher = "John Wiley and Sons Inc.",
number = "1",

}

TY - JOUR

T1 - Patterns and processes of brain diversification within esociform teleosts

AU - Means, Sheila M.

AU - Lannoo, Michael

PY - 1996

Y1 - 1996

N2 - The richness of nervous systems represented by extant fishes has not yet been fully determined; the brain morphology of many groups remains undescribed. For this reason we have begun to examine the brains of esociforms, a group representing basal euteleosts, focusing here on three goals: 1) to provide the first general descriptions of the brains of two esociform teleosts, Esox masquinongy (muskellunges) and Esox lucius (northern pikes); 2) to describe the neuronal development of E. masquinongy; and 3) to compare the differences in neuronal features between E. masquinongy and E. lucius with reference to the ontogeny of E. masquinongy. We demonstrate that relative to the brains of E. lucius and other basal euteleosts, the brains of E. masquinongy exhibit several paedomorphic features involving the position and morphology of nuclei present throughout the brain. This heterochronic shift parallels differences in nonneural morphological features described between these two species. We conclude that at finer taxonomic levels in some groups such as esocids, aspects of neuronal diversification may be explained by evolutionary transformations involving all body systems.

AB - The richness of nervous systems represented by extant fishes has not yet been fully determined; the brain morphology of many groups remains undescribed. For this reason we have begun to examine the brains of esociforms, a group representing basal euteleosts, focusing here on three goals: 1) to provide the first general descriptions of the brains of two esociform teleosts, Esox masquinongy (muskellunges) and Esox lucius (northern pikes); 2) to describe the neuronal development of E. masquinongy; and 3) to compare the differences in neuronal features between E. masquinongy and E. lucius with reference to the ontogeny of E. masquinongy. We demonstrate that relative to the brains of E. lucius and other basal euteleosts, the brains of E. masquinongy exhibit several paedomorphic features involving the position and morphology of nuclei present throughout the brain. This heterochronic shift parallels differences in nonneural morphological features described between these two species. We conclude that at finer taxonomic levels in some groups such as esocids, aspects of neuronal diversification may be explained by evolutionary transformations involving all body systems.

UR - http://www.scopus.com/inward/record.url?scp=0029804325&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029804325&partnerID=8YFLogxK

U2 - 10.1002/(SICI)1097-4687(199607)229:1<23::AID-JMOR2>3.0.CO;2-Q

DO - 10.1002/(SICI)1097-4687(199607)229:1<23::AID-JMOR2>3.0.CO;2-Q

M3 - Article

VL - 229

SP - 23

EP - 57

JO - Journal of Morphology

JF - Journal of Morphology

SN - 0362-2525

IS - 1

ER -