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Improved phylogenetic resolution within Siphonophora (Cnidaria) with implications for trait evolution

View ORCID ProfileCatriona Munro, View ORCID ProfileStefan Siebert, View ORCID ProfileFelipe Zapata, View ORCID ProfileMark Howison, View ORCID ProfileAlejandro Damian Serrano, Samuel H. Church, View ORCID ProfileFreya E. Goetz, Philip R. Pugh, View ORCID ProfileSteven H.D. Haddock, View ORCID ProfileCasey W. Dunn
doi: https://doi.org/10.1101/251116
Catriona Munro
1 Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
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  • For correspondence: catriona_munro@brown.edu
Stefan Siebert
1 Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
2Current address: Department of Molecular & Cellular Biology, University of California Davis, Davis, CA 95616, USA
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Felipe Zapata
3 Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, CA 90095, USA
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Mark Howison
4 Brown Data Science Practice, Brown University, Brown University, Providence, RI 02912, USA
5Current address: Watson Institute for International and Public Affairs, Brown University, Providence, RI 02912, USA
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Alejandro Damian Serrano
1 Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
10 Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, USA
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Samuel H. Church
1 Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
6Current address: Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
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Freya E. Goetz
1 Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
7Current address: Smithsonian Institution, National Museum of Natural History, Washington, DC 20560, USA
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Philip R. Pugh
8 National Oceanography Centre, Southampton, SO14 3ZH, UK
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Steven H.D. Haddock
9 Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USA
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Casey W. Dunn
10 Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, USA
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  • ORCID record for Casey W. Dunn
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Abstract

Siphonophores are a diverse group of hydrozoans (Cnidaria) that are found at all depths of the ocean - from the surface, like the familiar Portuguese man of war, to the deep sea. Siphonophores play an important role in ocean ecosystems, and are among the most abundant gelatinous predators. A previous phylogenetic study based on two ribosomal RNA genes provided insight into the internal relationships between major siphonophore groups, however there was little support for many deep relationships within the clade Codonophora. Here, we present a new siphonophore phylogeny based on new transcriptome data from 30 siphonophore species analyzed in combination with 13 publicly available genomic and transcriptomic datasets. We use this new phylogeny to reconstruct several traits that are central to siphonophore biology, including sexual system (monoecy vs. dioecy), gain and loss of zooid types, life history traits, and habitat. The phylogenetic relationships in this study are largely consistent with the previous phylogeny, but we find strong support for new clades within Codonophora that were previously unresolved. These results have important implications for trait evolution within Siphonophora, including favoring the hypothesis that monoecy arose twice.

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Posted January 20, 2018.
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Improved phylogenetic resolution within Siphonophora (Cnidaria) with implications for trait evolution
Catriona Munro, Stefan Siebert, Felipe Zapata, Mark Howison, Alejandro Damian Serrano, Samuel H. Church, Freya E. Goetz, Philip R. Pugh, Steven H.D. Haddock, Casey W. Dunn
bioRxiv 251116; doi: https://doi.org/10.1101/251116
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Improved phylogenetic resolution within Siphonophora (Cnidaria) with implications for trait evolution
Catriona Munro, Stefan Siebert, Felipe Zapata, Mark Howison, Alejandro Damian Serrano, Samuel H. Church, Freya E. Goetz, Philip R. Pugh, Steven H.D. Haddock, Casey W. Dunn
bioRxiv 251116; doi: https://doi.org/10.1101/251116

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