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    Evolutionary biogeography of the reef-building coral genus Galaxea across the Indo-Pacific ocean.

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    Name:
    evolutionary_1-s2.0-S1055790320301779-main.pdf
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    3.489Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-07-12
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    Type
    Article
    Authors
    Wepfer, Patricia H
    Nakajima, Yuichi
    Sutthacheep, Makamas
    Radice, Veronica Z
    Richards, Zoe
    Ang, Put
    Terraneo, Tullia Isotta cc
    Sudek, Mareike
    Fujimura, Atsushi
    Toonen, Robert J
    Mikheyev, Alexander S
    Economo, Evan P
    Mitarai, Satoshi
    KAUST Department
    Marine Science Program
    Marine Science
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2020-07-09
    Online Publication Date
    2020-07-09
    Print Publication Date
    2020-10
    Embargo End Date
    2021-07-12
    Submitted Date
    2019-08-09
    Permanent link to this record
    http://hdl.handle.net/10754/664252
    
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    Show full item record
    Abstract
    Stony corals (Scleractinia) form the basis for some of the most diverse ecosytems on Earth, but we have much to learn about their evolutionary history and systematic relationships. In order to improve our understanding of species in corals we here investigated phylogenetic relationships between morphologically defined species and genetic lineages in the genus Galaxea (Euphyllidae) using a combined phylogenomic and phylogeographic approach. Previous studies revealed the nominal species G. fascicularis included three genetically well-differentiated lineages (L, S & L+) in the western Pacific, but their distribution and relationship to other species in the genus was unknown. Based on genomic (RAD-seq) and mitochondrial sequence data (non-coding region between cytb and ND2) we investigated whether the morphological taxa represent genetically coherent entities and what is the phylogenetic relationship and spatial distribution of the three lineages of G. fascicularis throughout the observed species range. Using the RAD-seq data, we find that the genus Galaxea is monophyletic and contains three distinct clades: an Indo-Pacific, a Pacific, and a small clade restricted to the Chagos Archipelago. The three lineages of G. fascicularis were associated with different RAD-seq clades, with the 'L' lineage showing some morphological distinction from the other two lineages (larger more asymmetrical polyps). In addition to these, three more genetic lineages in G. fascicularis may be distinguished - a Chagossian, an Ogasawaran, and one from the Indian-Red Sea. Among nominal taxa for which we have multiple samples, G. horrescens was the only monophyletic species. The mitochondrial non-coding region is highly conserved apart of the length polymorphism used to define L, S & L+ lineages and lacks the power to distinguish morphological and genetic groups resolved with genomic RAD-sequencing. The polyphyletic nature of most species warrants a careful examination of the accepted taxonomy of this group with voucher collections and their comparison to type specimens to resolve species boundaries. Further insight to the speciation process in corals will require international cooperation for the sharing of specimens to facilitate scientific discovery.
    Citation
    Wepfer, P. H., Nakajima, Y., Sutthacheep, M., Radice, V. Z., Richards, Z., Ang, P., … Mitarai, S. (2020). Evolutionary biogeography of the reef-building coral genus Galaxea across the Indo-Pacific ocean. Molecular Phylogenetics and Evolution, 106905. doi:10.1016/j.ympev.2020.106905
    Publisher
    Elsevier BV
    Journal
    Molecular phylogenetics and evolution
    DOI
    10.1016/j.ympev.2020.106905
    PubMed ID
    32652124
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S1055790320301779
    Relations
    Is Supplemented By:
    • [Dataset]
      Wepfer, P., Wepfer, P. H., Nakajima, Y., Sutthacheep, M., Radice, V. Z., Richards, Z., Ang, P., Terraneo, T., Sudek, M., Fujimura, A., Toonen, R. J., Mikheyev, A. S., Economo, E. P., & Mitarai, S. (2020). Evolutionary biogeography of the reef-building coral genus Galaxea across the Indo-Pacific ocean (Version 2) [Data set]. Dryad. https://doi.org/10.5061/DRYAD.VDNCJSXSR. DOI: 10.5061/dryad.vdncjsxsr Handle: 10754/667003
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ympev.2020.106905
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program

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