Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons
Monoplacophorans are among the rarest members of the phylum Mollusca. Previously only known from fossils since the Cambrian, the first living monoplacophoran was discovered during the famous second Galathea deep-sea expedition. The anatomy of these molluscs shocked the zoological community for prese...
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ftpubmed:oai:pubmedcentral.nih.gov:1472512 2023-05-15T13:54:27+02:00 Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons Giribet, Gonzalo Okusu, Akiko Lindgren, Annie R. Huff, Stephanie W. Schrödl, Michael Nishiguchi, Michele K. 2006-05-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1472512 http://www.ncbi.nlm.nih.gov/pubmed/16675549 https://doi.org/10.1073/pnas.0602578103 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1472512 http://www.ncbi.nlm.nih.gov/pubmed/16675549 http://dx.doi.org/10.1073/pnas.0602578103 © 2006 by The National Academy of Sciences of the USA Biological Sciences Text 2006 ftpubmed https://doi.org/10.1073/pnas.0602578103 2013-08-31T02:01:12Z Monoplacophorans are among the rarest members of the phylum Mollusca. Previously only known from fossils since the Cambrian, the first living monoplacophoran was discovered during the famous second Galathea deep-sea expedition. The anatomy of these molluscs shocked the zoological community for presenting serially repeated gills, nephridia, and eight sets of dorsoventral pedal retractor muscles. Seriality of organs in supposedly independent molluscan lineages, i.e., in chitons and the deep-sea living fossil monoplacophorans, was assumed to be a relict of ancestral molluscan segmentation and was commonly accepted to support a direct relationship with annelids. We were able to obtain one specimen of a monoplacophoran Antarctic deep-sea species for molecular study. The first molecular data on monoplacophorans, analyzed together with the largest data set of molluscs ever assembled, clearly illustrate that monoplacophorans and chitons form a clade. This “Serialia” concept may revolutionize molluscan systematics and may have important implications for metazoan evolution as it allows for new interpretations for primitive segmentation in molluscs. Text Antarc* Antarctic PubMed Central (PMC) Antarctic Proceedings of the National Academy of Sciences 103 20 7723 7728 |
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Biological Sciences |
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Biological Sciences Giribet, Gonzalo Okusu, Akiko Lindgren, Annie R. Huff, Stephanie W. Schrödl, Michael Nishiguchi, Michele K. Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
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Biological Sciences |
description |
Monoplacophorans are among the rarest members of the phylum Mollusca. Previously only known from fossils since the Cambrian, the first living monoplacophoran was discovered during the famous second Galathea deep-sea expedition. The anatomy of these molluscs shocked the zoological community for presenting serially repeated gills, nephridia, and eight sets of dorsoventral pedal retractor muscles. Seriality of organs in supposedly independent molluscan lineages, i.e., in chitons and the deep-sea living fossil monoplacophorans, was assumed to be a relict of ancestral molluscan segmentation and was commonly accepted to support a direct relationship with annelids. We were able to obtain one specimen of a monoplacophoran Antarctic deep-sea species for molecular study. The first molecular data on monoplacophorans, analyzed together with the largest data set of molluscs ever assembled, clearly illustrate that monoplacophorans and chitons form a clade. This “Serialia” concept may revolutionize molluscan systematics and may have important implications for metazoan evolution as it allows for new interpretations for primitive segmentation in molluscs. |
format |
Text |
author |
Giribet, Gonzalo Okusu, Akiko Lindgren, Annie R. Huff, Stephanie W. Schrödl, Michael Nishiguchi, Michele K. |
author_facet |
Giribet, Gonzalo Okusu, Akiko Lindgren, Annie R. Huff, Stephanie W. Schrödl, Michael Nishiguchi, Michele K. |
author_sort |
Giribet, Gonzalo |
title |
Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
title_short |
Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
title_full |
Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
title_fullStr |
Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
title_full_unstemmed |
Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons |
title_sort |
evidence for a clade composed of molluscs with serially repeated structures: monoplacophorans are related to chitons |
publisher |
National Academy of Sciences |
publishDate |
2006 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1472512 http://www.ncbi.nlm.nih.gov/pubmed/16675549 https://doi.org/10.1073/pnas.0602578103 |
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Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1472512 http://www.ncbi.nlm.nih.gov/pubmed/16675549 http://dx.doi.org/10.1073/pnas.0602578103 |
op_rights |
© 2006 by The National Academy of Sciences of the USA |
op_doi |
https://doi.org/10.1073/pnas.0602578103 |
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Proceedings of the National Academy of Sciences |
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103 |
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20 |
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7723 |
op_container_end_page |
7728 |
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1766260308740931584 |