Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal
Background: Although recent studies have greatly advanced understanding of deep molluscan phylogeny, placement of some taxa remains uncertain as different datasets support competing class-relationships. Traditionally, morphologists have placed Monoplacophora, a group of morphologically simple, limpe...
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Ludwig-Maximilians-Universität München
2016
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ftmuenchenepub:oai:epub.ub.uni-muenchen.de:37388 2023-05-15T13:55:00+02:00 Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal Stöger, I. Kocot, K. M. Poustka, A. J. Wilson, N. G. Ivanov, D. Halanych, K. M. Schrödl, M. 2016-01-01 application/pdf https://epub.ub.uni-muenchen.de/37388/1/10.1186_s12862-016-0829-3.pdf https://epub.ub.uni-muenchen.de/37388/ http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-37388-5 https://doi.org/10.1186/s12862-016-0829-3 eng eng Ludwig-Maximilians-Universität München Stöger, I.; Kocot, K. M.; Poustka, A. J.; Wilson, N. G.; Ivanov, D.; Halanych, K. M.; Schrödl, M. (2016): Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal. In: BMC Evolutionary Biology 16:274 [PDF, 1MB] https://epub.ub.uni-muenchen.de/37388/1/10.1186_s12862-016-0829-3.pdf http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-37388-5 https://epub.ub.uni-muenchen.de/37388/ doi:10.1186/s12862-016-0829-3 BMC Evolutionary Biology Department Biologie II ddc:570 doc-type:article Zeitschriftenartikel NonPeerReviewed 2016 ftmuenchenepub https://doi.org/10.1186/s12862-016-0829-3 2022-04-25T12:45:28Z Background: Although recent studies have greatly advanced understanding of deep molluscan phylogeny, placement of some taxa remains uncertain as different datasets support competing class-relationships. Traditionally, morphologists have placed Monoplacophora, a group of morphologically simple, limpet-like molluscs as sister group to all other conchiferans (shelled molluscs other than Polyplacophora), a grouping that is supported by the latest large-scale phylogenomic study that includes Laevipilina. However, molecular datasets dominated by nuclear ribosomal genes support Monoplacophora + Polyplacophora (Serialia). Here, we evaluate the potential of mitochondrial genome data for resolving placement of Monoplacophora. Results: Two complete (Laevipilina antarctica and Vema ewingi) and one partial (Laevipilina hyalina) mitochondrial genomes were sequenced, assembled, and compared. All three genomes show a highly similar architecture including an unusually high number of non-coding regions. Comparison of monoplacophoran gene order shows a gene arrangement pattern not previously reported;there is an inversion of one large gene cluster. Our reanalyses of recently published polyplacophoran mitogenomes show, however, that this feature is also present in some chiton species. Maximum Likelihood and Bayesian Inference analyses of 13 mitochondrial protein-coding genes failed to robustly place Monoplacophora and hypothesis testing could not reject any of the evaluated placements of Monoplacophora. Conclusions: Under both serialian or aculiferan-conchiferan scenarios, the observed gene cluster inversion appears to be a convergent evolution of gene arrangements in molluscs. Our phylogenetic results are inconclusive and sensitive to taxon sampling. Aculifera (Polyplacophora + Aplacophora) and Conchifera were never recovered. However, some analyses recovered Serialia (Monoplacophora + Polyplacophora), Diasoma (Bivalvia + Scaphopoda) or Pleistomollusca (Bivalvia + Gastropoda). Although we could not shed light on deep evolutionary traits of Mollusca we found unique patterns of gene arrangements that are common to monoplacophoran and chitonine polyplacophoran species but not to acanthochitonine Polyplacophora. Article in Journal/Newspaper Antarc* Antarctica Open Access LMU (Ludwig-Maximilians-University Munich) BMC Evolutionary Biology 16 1 |
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Open Polar |
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Open Access LMU (Ludwig-Maximilians-University Munich) |
op_collection_id |
ftmuenchenepub |
language |
English |
topic |
Department Biologie II ddc:570 |
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Department Biologie II ddc:570 Stöger, I. Kocot, K. M. Poustka, A. J. Wilson, N. G. Ivanov, D. Halanych, K. M. Schrödl, M. Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
topic_facet |
Department Biologie II ddc:570 |
description |
Background: Although recent studies have greatly advanced understanding of deep molluscan phylogeny, placement of some taxa remains uncertain as different datasets support competing class-relationships. Traditionally, morphologists have placed Monoplacophora, a group of morphologically simple, limpet-like molluscs as sister group to all other conchiferans (shelled molluscs other than Polyplacophora), a grouping that is supported by the latest large-scale phylogenomic study that includes Laevipilina. However, molecular datasets dominated by nuclear ribosomal genes support Monoplacophora + Polyplacophora (Serialia). Here, we evaluate the potential of mitochondrial genome data for resolving placement of Monoplacophora. Results: Two complete (Laevipilina antarctica and Vema ewingi) and one partial (Laevipilina hyalina) mitochondrial genomes were sequenced, assembled, and compared. All three genomes show a highly similar architecture including an unusually high number of non-coding regions. Comparison of monoplacophoran gene order shows a gene arrangement pattern not previously reported;there is an inversion of one large gene cluster. Our reanalyses of recently published polyplacophoran mitogenomes show, however, that this feature is also present in some chiton species. Maximum Likelihood and Bayesian Inference analyses of 13 mitochondrial protein-coding genes failed to robustly place Monoplacophora and hypothesis testing could not reject any of the evaluated placements of Monoplacophora. Conclusions: Under both serialian or aculiferan-conchiferan scenarios, the observed gene cluster inversion appears to be a convergent evolution of gene arrangements in molluscs. Our phylogenetic results are inconclusive and sensitive to taxon sampling. Aculifera (Polyplacophora + Aplacophora) and Conchifera were never recovered. However, some analyses recovered Serialia (Monoplacophora + Polyplacophora), Diasoma (Bivalvia + Scaphopoda) or Pleistomollusca (Bivalvia + Gastropoda). Although we could not shed light on deep evolutionary traits of Mollusca we found unique patterns of gene arrangements that are common to monoplacophoran and chitonine polyplacophoran species but not to acanthochitonine Polyplacophora. |
format |
Article in Journal/Newspaper |
author |
Stöger, I. Kocot, K. M. Poustka, A. J. Wilson, N. G. Ivanov, D. Halanych, K. M. Schrödl, M. |
author_facet |
Stöger, I. Kocot, K. M. Poustka, A. J. Wilson, N. G. Ivanov, D. Halanych, K. M. Schrödl, M. |
author_sort |
Stöger, I. |
title |
Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
title_short |
Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
title_full |
Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
title_fullStr |
Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
title_full_unstemmed |
Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
title_sort |
monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal |
publisher |
Ludwig-Maximilians-Universität München |
publishDate |
2016 |
url |
https://epub.ub.uni-muenchen.de/37388/1/10.1186_s12862-016-0829-3.pdf https://epub.ub.uni-muenchen.de/37388/ http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-37388-5 https://doi.org/10.1186/s12862-016-0829-3 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
BMC Evolutionary Biology |
op_relation |
Stöger, I.; Kocot, K. M.; Poustka, A. J.; Wilson, N. G.; Ivanov, D.; Halanych, K. M.; Schrödl, M. (2016): Monoplacophoran mitochondrial genomes: convergent gene arrangements and little phylogenetic signal. In: BMC Evolutionary Biology 16:274 [PDF, 1MB] https://epub.ub.uni-muenchen.de/37388/1/10.1186_s12862-016-0829-3.pdf http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-37388-5 https://epub.ub.uni-muenchen.de/37388/ doi:10.1186/s12862-016-0829-3 |
op_doi |
https://doi.org/10.1186/s12862-016-0829-3 |
container_title |
BMC Evolutionary Biology |
container_volume |
16 |
container_issue |
1 |
_version_ |
1766261228306432000 |