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Phylogenomic analyses of deep gastropod relationships reject Orthogastropoda

Felipe Zapata, Nerida G. Wilson, Mark Howison, Sónia C.S. Andrade, Katharina M. Jörger, Michael Schrödl, Freya E. Goetz, Gonzalo Giribet, Casey W. Dunn
doi: https://doi.org/10.1101/007039
Felipe Zapata
1Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02906, USA
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Nerida G. Wilson
2Western Australian Museum, Welshpool WA 6106, Australia
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Mark Howison
3Center for Computation and Visualization, Brown University, Providence, RI 02906, USA
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Sónia C.S. Andrade
4Museum of Comparative Zoology, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA
5Current address: Departamento de Zootecnia, ESALQ-USP, Piracicaba-SP 13418-900, Brazil
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Katharina M. Jörger
6SNSB-Bavarian State Collection of Zoology, Munich 81247, Germany
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Michael Schrödl
6SNSB-Bavarian State Collection of Zoology, Munich 81247, Germany
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Freya E. Goetz
1Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02906, USA
7Current address: Department of Invertebrate Zoology, Smithsonian Museum of Natural History, Washington DC, USA
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Gonzalo Giribet
4Museum of Comparative Zoology, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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Casey W. Dunn
1Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02906, USA
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Abstract

Gastropods are a highly diverse clade of molluscs that includes many familiar animals, such as limpets, snails, slugs, and sea slugs. It is one of the most abundant groups of animals in the sea and the only molluscan lineage that has successfully colonised land. Yet the relationships among and within its constituent clades have remained in flux for over a century of morphological, anatomical and molecular study. Here we re-evaluate gastropod phylogenetic relationships by collecting new transcriptome data for 40 species and analysing them in combination with publicly available genomes and transcriptomes. Our datasets include all five main gastropod clades: Patellogastropoda, Vetigastropoda, Neritimorpha, Caenogastropoda and Heterobranchia. We use two different methods to assign orthology, subsample each of these matrices into three increasingly dense subsets, and analyse all six of these supermatrices with two different models of molecular evolution. All twelve analyses yield the same unrooted network connecting the five major gastropod lineages. This reduces deep gastropod phylogeny to three alternative rooting hypotheses. These results reject the prevalent hypothesis of gastropod phylogeny, Orthogastropoda. Our dated tree is congruent with a possible end-Permian recovery of some gastropod clades, namely Caenogastropoda and some Heterobranchia subclades.

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Posted August 21, 2014.
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Phylogenomic analyses of deep gastropod relationships reject Orthogastropoda
Felipe Zapata, Nerida G. Wilson, Mark Howison, Sónia C.S. Andrade, Katharina M. Jörger, Michael Schrödl, Freya E. Goetz, Gonzalo Giribet, Casey W. Dunn
bioRxiv 007039; doi: https://doi.org/10.1101/007039
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Phylogenomic analyses of deep gastropod relationships reject Orthogastropoda
Felipe Zapata, Nerida G. Wilson, Mark Howison, Sónia C.S. Andrade, Katharina M. Jörger, Michael Schrödl, Freya E. Goetz, Gonzalo Giribet, Casey W. Dunn
bioRxiv 007039; doi: https://doi.org/10.1101/007039

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