A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)

[Background] Polyplacophora, or chitons, have long fascinated malacologists for their distinct and rather conserved morphology and lifestyle compared to other mollusk classes. However, key aspects of their phylogeny and evolution remain unclear due to the few morphological, molecular, or combined ph...

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Detalles Bibliográficos
Autores: Irisarri, Íker, Uribe, Juan E., Douglas, J. Eernisse, Zardoya, Rafael
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/233233
Acceso en línea:http://hdl.handle.net/10261/233233
Access Level:acceso abierto
Palabra clave:Bayesian
Evolution
Fossils
Maximum likelihood
Mitochondrial genome
Molecular clocks
Mollusk
Mt
Timetree
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spelling A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)Irisarri, ÍkerUribe, Juan E.Douglas, J. EernisseZardoya, RafaelBayesianEvolutionFossilsMaximum likelihoodMitochondrial genomeMolecular clocksMolluskMtTimetree[Background] Polyplacophora, or chitons, have long fascinated malacologists for their distinct and rather conserved morphology and lifestyle compared to other mollusk classes. However, key aspects of their phylogeny and evolution remain unclear due to the few morphological, molecular, or combined phylogenetic analyses, particularly those addressing the relationships among the major chiton lineages. [Results] Here, we present a mitogenomic phylogeny of chitons based on 13 newly sequenced mitochondrial genomes along with eight available ones and RNAseq-derived mitochondrial sequences from four additional species. Reconstructed phylogenies largely agreed with the latest advances in chiton systematics and integrative taxonomy but we identified some conflicts that call for taxonomic revisions. Despite an overall conserved gene order in chiton mitogenomes, we described three new rearrangements that might have taxonomic utility and reconstructed the most likely scenario of gene order change in this group. Our phylogeny was time-calibrated using various fossils and relaxed molecular clocks, and the robustness of these analyses was assessed with several sensitivity analyses. The inferred ages largely agreed with previous molecular clock estimates and the fossil record, but we also noted that the ambiguities inherent to the chiton fossil record might confound molecular clock analyses. [Conclusions] In light of the reconstructed time-calibrated framework, we discuss the evolution of key morphological features and call for a continued effort towards clarifying the phylogeny and evolution of chitons.BioMed CentralConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120202021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/233233reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1186/s12862-019-1573-2Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2332332026-05-22T06:33:51Z
dc.title.none.fl_str_mv A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
title A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
spellingShingle A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
Irisarri, Íker
Bayesian
Evolution
Fossils
Maximum likelihood
Mitochondrial genome
Molecular clocks
Mollusk
Mt
Timetree
title_short A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
title_full A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
title_fullStr A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
title_full_unstemmed A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
title_sort A mitogenomic phylogeny of chitons (Mollusca: Polyplacophora)
dc.creator.none.fl_str_mv Irisarri, Íker
Uribe, Juan E.
Douglas, J. Eernisse
Zardoya, Rafael
author Irisarri, Íker
author_facet Irisarri, Íker
Uribe, Juan E.
Douglas, J. Eernisse
Zardoya, Rafael
author_role author
author2 Uribe, Juan E.
Douglas, J. Eernisse
Zardoya, Rafael
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Bayesian
Evolution
Fossils
Maximum likelihood
Mitochondrial genome
Molecular clocks
Mollusk
Mt
Timetree
topic Bayesian
Evolution
Fossils
Maximum likelihood
Mitochondrial genome
Molecular clocks
Mollusk
Mt
Timetree
description [Background] Polyplacophora, or chitons, have long fascinated malacologists for their distinct and rather conserved morphology and lifestyle compared to other mollusk classes. However, key aspects of their phylogeny and evolution remain unclear due to the few morphological, molecular, or combined phylogenetic analyses, particularly those addressing the relationships among the major chiton lineages. [Results] Here, we present a mitogenomic phylogeny of chitons based on 13 newly sequenced mitochondrial genomes along with eight available ones and RNAseq-derived mitochondrial sequences from four additional species. Reconstructed phylogenies largely agreed with the latest advances in chiton systematics and integrative taxonomy but we identified some conflicts that call for taxonomic revisions. Despite an overall conserved gene order in chiton mitogenomes, we described three new rearrangements that might have taxonomic utility and reconstructed the most likely scenario of gene order change in this group. Our phylogeny was time-calibrated using various fossils and relaxed molecular clocks, and the robustness of these analyses was assessed with several sensitivity analyses. The inferred ages largely agreed with previous molecular clock estimates and the fossil record, but we also noted that the ambiguities inherent to the chiton fossil record might confound molecular clock analyses. [Conclusions] In light of the reconstructed time-calibrated framework, we discuss the evolution of key morphological features and call for a continued effort towards clarifying the phylogeny and evolution of chitons.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/233233
url http://hdl.handle.net/10261/233233
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1186/s12862-019-1573-2
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv BioMed Central
publisher.none.fl_str_mv BioMed Central
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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