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    Cryptic species and host specificity in the bryozoan-associated hydrozoan Zanclea divergens (Hydrozoa, Zancleidae).

    Zanclea divergens (Hydrozoa, Zancleidae) is a complex of bryozoan-associated species showing different patterns of diversification

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    Cryptic_1-s2.0-S1055790320301652-main.pdf
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    Type
    Article
    Authors
    Maggioni, Davide
    Schiavo, Andrea
    Ostrovsky, Andrew N
    Seveso, Davide
    Galli, Paolo
    Arrigoni, Roberto
    Berumen, Michael L. cc
    Benzoni, Francesca cc
    Montano, Simone
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Marine Science Program
    Red Sea Research Center (RSRC)
    Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia.
    Reef Ecology Lab
    Date
    2020-06-18
    Online Publication Date
    2020-06-18
    Print Publication Date
    2020-10
    Embargo End Date
    2021-06-21
    Submitted Date
    2020-02-11
    Permanent link to this record
    http://hdl.handle.net/10754/663754
    
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    Abstract
    Zanclea divergens is a tropical hydrozoan living in symbiotic association with bryozoans and currently reported from Papua New Guinea, Indonesia, and Maldives. Here, we used an integrative approach to assess the morpho-molecular diversity of the species across the Indo-Pacific. Phylogenetic and species delimitation analyses based on seven mitochondrial and nuclear loci revealed four well-supported molecular lineages corresponding to cryptic species, and representing a Pacific clade, an Indian clade, and two Red Sea clades. Since the general polyp morphology was almost identical in all samples, the nematocyst capsules were measured and analysed to search for possible fine-scale differences, and their statistical treatment revealed a significant difference in terms of length and width among the clades investigated. All Zanclea divergens specimens were specifically associated with cheilostome bryozoans belonging to the genus Celleporaria. The Pacific and Indian clades were associated with Celleporaria sp. and C. vermiformis, respectively, whereas both Red Sea lineages were associated with C. pigmentaria. Nevertheless, the sequencing of host bryozoans revealed that one of the Red Sea hydrozoan clades is associated with two morphologically undistinguishable, but genetically divergent, bryozoan species. Overall, our results show that Z. divergens is a species complex composed of morphologically cryptic lineages showing partially disjunct distributions and host specificity. The presence of two sympatric lineages living on the same host species reveal complex dynamics of diversification, and future research aimed at understanding their diversification process will likely improve our knowledge on the mechanisms of speciation among currently sympatric cryptic species.
    Citation
    Maggioni, D., Schiavo, A., Ostrovsky, A. N., Seveso, D., Galli, P., Arrigoni, R., … Montano, S. (2020). Cryptic species and host specificity in the bryozoan-associated hydrozoan Zanclea divergens (Hydrozoa, Zancleidae). Molecular Phylogenetics and Evolution, 106893. doi:10.1016/j.ympev.2020.106893
    Publisher
    Elsevier BV
    Journal
    Molecular phylogenetics and evolution
    DOI
    10.1016/j.ympev.2020.106893
    PubMed ID
    32562820
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S1055790320301652
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ympev.2020.106893
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Environmental Science and Engineering Program; Marine Science Program

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