Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms
Hemichordates are instrumental to understanding early deuterostome and chordate evolution, yet diversity and relationships within the group have been understudied. Recently, there has been renewed interest in hemichordate diversity and taxonomy, although current findings suggest that much hemichorda...
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ftdatacite:10.35099/aurora-107 2023-05-15T13:49:52+02:00 Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms Cannon, Johanna T. Swalla, Billie J. Halanych, Kenneth M. 2013 PDF https://dx.doi.org/10.35099/aurora-107 https://aurora.auburn.edu/handle/11200/50038 unknown University of Chicago Press ©The Authors 2013. ©University of Chicago Press 2013. This is this the version of record published by the University of Chicago Press. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Cannon, J. T., Swalla, B. J., & Halanych, K. M. (2013). Hemichordate molecular phylogeny reveals a novel cold-water clade of harrimaniid acorn worms. The Biological Bulletin, 225(3), 194-204. article-journal ScholarlyArticle Text Journal Article, Academic Journal 2013 ftdatacite https://doi.org/10.35099/aurora-107 2022-04-01T11:22:23Z Hemichordates are instrumental to understanding early deuterostome and chordate evolution, yet diversity and relationships within the group have been understudied. Recently, there has been renewed interest in hemichordate diversity and taxonomy, although current findings suggest that much hemichordate diversity remains to be discovered. Herein, we present a molecular phylogenetic study based on nuclear 18S rDNA sequence data, which includes 35 previously unsampled taxa and represents all recognized hemichordate families. We include mitochondrial 16S rDNA data from 66 enteropneust taxa and three pterobranch Rhabdopleura species, and recover colonial pterobranchs and solitary enteropneusts as reciprocally monophyletic taxa. Our phylogenetic results also reveal a previously unknown clade of at least four species of harrimaniid enteropneusts from cold waters, including Antarctica, the North Atlantic around Iceland and Norway, and the deep sea off Oregon. These small worms (1-5 mm in length), occur from 130 to 2950 m and are not closely related to other deep-sea harrimaniids, indicating that diversity of enteropneusts within the deep sea is broader than previously described in the literature. Discovery of this clade, as well as larger torquaratorids from Antarctica, strengthens hypotheses of close associations between Antarctic and deep-sea fauna. Text Antarc* Antarctic Antarctica Iceland North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Norway |
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Hemichordates are instrumental to understanding early deuterostome and chordate evolution, yet diversity and relationships within the group have been understudied. Recently, there has been renewed interest in hemichordate diversity and taxonomy, although current findings suggest that much hemichordate diversity remains to be discovered. Herein, we present a molecular phylogenetic study based on nuclear 18S rDNA sequence data, which includes 35 previously unsampled taxa and represents all recognized hemichordate families. We include mitochondrial 16S rDNA data from 66 enteropneust taxa and three pterobranch Rhabdopleura species, and recover colonial pterobranchs and solitary enteropneusts as reciprocally monophyletic taxa. Our phylogenetic results also reveal a previously unknown clade of at least four species of harrimaniid enteropneusts from cold waters, including Antarctica, the North Atlantic around Iceland and Norway, and the deep sea off Oregon. These small worms (1-5 mm in length), occur from 130 to 2950 m and are not closely related to other deep-sea harrimaniids, indicating that diversity of enteropneusts within the deep sea is broader than previously described in the literature. Discovery of this clade, as well as larger torquaratorids from Antarctica, strengthens hypotheses of close associations between Antarctic and deep-sea fauna. |
format |
Text |
author |
Cannon, Johanna T. Swalla, Billie J. Halanych, Kenneth M. |
spellingShingle |
Cannon, Johanna T. Swalla, Billie J. Halanych, Kenneth M. Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
author_facet |
Cannon, Johanna T. Swalla, Billie J. Halanych, Kenneth M. |
author_sort |
Cannon, Johanna T. |
title |
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
title_short |
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
title_full |
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
title_fullStr |
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
title_full_unstemmed |
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms |
title_sort |
hemichordate molecular phylogeny reveals a novel cold-water clade of harrimaniid acorn worms |
publisher |
University of Chicago Press |
publishDate |
2013 |
url |
https://dx.doi.org/10.35099/aurora-107 https://aurora.auburn.edu/handle/11200/50038 |
geographic |
Antarctic Norway |
geographic_facet |
Antarctic Norway |
genre |
Antarc* Antarctic Antarctica Iceland North Atlantic |
genre_facet |
Antarc* Antarctic Antarctica Iceland North Atlantic |
op_rights |
©The Authors 2013. ©University of Chicago Press 2013. This is this the version of record published by the University of Chicago Press. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Cannon, J. T., Swalla, B. J., & Halanych, K. M. (2013). Hemichordate molecular phylogeny reveals a novel cold-water clade of harrimaniid acorn worms. The Biological Bulletin, 225(3), 194-204. |
op_doi |
https://doi.org/10.35099/aurora-107 |
_version_ |
1766252458135257088 |