Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids
Abstract In the high‐latitude shelf waters of Antarctica, fishes in the perciform suborder Notothenioidei dominate the fish fauna and constitute an adaptive radiation and a species flock. The 25 species of notothenioid plunderfishes, comprising four genera of the family Artedidraconidae, contribute...
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crwiley:10.1002/jmor.10068 2024-06-23T07:46:44+00:00 Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids Eastman, Joseph T. Lannoo, Michael J. 2003 http://dx.doi.org/10.1002/jmor.10068 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.10068 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.10068 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Morphology volume 255, issue 3, page 358-377 ISSN 0362-2525 1097-4687 journal-article 2003 crwiley https://doi.org/10.1002/jmor.10068 2024-05-31T08:12:41Z Abstract In the high‐latitude shelf waters of Antarctica, fishes in the perciform suborder Notothenioidei dominate the fish fauna and constitute an adaptive radiation and a species flock. The 25 species of notothenioid plunderfishes, comprising four genera of the family Artedidraconidae, contribute substantially to fish species diversity on the high Antarctic shelf. A mental barbel is an autapomorphy for the family. Dolloidraco longedorsalis is the most abundant artedidraconid at depths over 400 m in these waters. In this article we present the anatomy and histology of the brain and special sense organs of Dolloidraco and compare it to the brains of other artedidraconids, closely related harpagiferids, and more generally to other notothenioids. We provide a detailed drawing of the brain and cranial nerves. The brain of Dolloidraco is simple, without external hypertrophy of sensory or motor regions, but contains several unusual features associated with the ventricular system and CSF, including well‐developed circumventricular organs, subependymal expansions, and subarachnoid cisterns; and a ventricle in the corpus cerebellum. The brain of Dolloidraco also contains a lobed chief sensory nucleus of the trigeminal nerve that is correlated across species with barbel length. The eyes are large and contain a small choroid rete, a structure previously thought to be absent from members of this family. We document the histology of the duplex retina, olfactory apparatus, cutaneous taste buds, and barbel musculature and innervation. We discuss the role of pedomorphy in producing simplified brain morphologies. We consider the possibility that Dolloidraco is a somatosensory specialist—an unusual feature among vertebrates—and decide that this is unlikely. J. Morphol. 255:358–377, 2003. © 2003 Wiley‐Liss, Inc. Article in Journal/Newspaper Antarc* Antarctic Antarctica Wiley Online Library Antarctic The Antarctic Journal of Morphology 255 3 358 377 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In the high‐latitude shelf waters of Antarctica, fishes in the perciform suborder Notothenioidei dominate the fish fauna and constitute an adaptive radiation and a species flock. The 25 species of notothenioid plunderfishes, comprising four genera of the family Artedidraconidae, contribute substantially to fish species diversity on the high Antarctic shelf. A mental barbel is an autapomorphy for the family. Dolloidraco longedorsalis is the most abundant artedidraconid at depths over 400 m in these waters. In this article we present the anatomy and histology of the brain and special sense organs of Dolloidraco and compare it to the brains of other artedidraconids, closely related harpagiferids, and more generally to other notothenioids. We provide a detailed drawing of the brain and cranial nerves. The brain of Dolloidraco is simple, without external hypertrophy of sensory or motor regions, but contains several unusual features associated with the ventricular system and CSF, including well‐developed circumventricular organs, subependymal expansions, and subarachnoid cisterns; and a ventricle in the corpus cerebellum. The brain of Dolloidraco also contains a lobed chief sensory nucleus of the trigeminal nerve that is correlated across species with barbel length. The eyes are large and contain a small choroid rete, a structure previously thought to be absent from members of this family. We document the histology of the duplex retina, olfactory apparatus, cutaneous taste buds, and barbel musculature and innervation. We discuss the role of pedomorphy in producing simplified brain morphologies. We consider the possibility that Dolloidraco is a somatosensory specialist—an unusual feature among vertebrates—and decide that this is unlikely. J. Morphol. 255:358–377, 2003. © 2003 Wiley‐Liss, Inc. |
format |
Article in Journal/Newspaper |
author |
Eastman, Joseph T. Lannoo, Michael J. |
spellingShingle |
Eastman, Joseph T. Lannoo, Michael J. Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
author_facet |
Eastman, Joseph T. Lannoo, Michael J. |
author_sort |
Eastman, Joseph T. |
title |
Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
title_short |
Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
title_full |
Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
title_fullStr |
Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
title_full_unstemmed |
Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
title_sort |
anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/jmor.10068 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.10068 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.10068 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Journal of Morphology volume 255, issue 3, page 358-377 ISSN 0362-2525 1097-4687 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jmor.10068 |
container_title |
Journal of Morphology |
container_volume |
255 |
container_issue |
3 |
container_start_page |
358 |
op_container_end_page |
377 |
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1802647880541929472 |