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Molecular phylogeny of the Cladophoraceae (Cladophorales, Ulvophyceae), with the resurrection of Acrocladus Nägeli and Willeella Børgesen, and the description of Lurbica gen. nov. and Pseudorhizoclonium gen. nov.
Boedeker, C.; Leliaert, F.; Zuccarello, G.C. (2016). Molecular phylogeny of the Cladophoraceae (Cladophorales, Ulvophyceae), with the resurrection of Acrocladus Nägeli and Willeella Børgesen, and the description of Lurbica gen. nov. and Pseudorhizoclonium gen. nov. J. Phycol. 52(6): 905-928. https://dx.doi.org/10.1111/jpy.12457
In: Journal of Phycology. Blackwell Science: New York. ISSN 0022-3646; e-ISSN 1529-8817, more
Peer reviewed article  
Available in  Authors 
Keywords
    Chaetomorpha Kützing, 1845 [WoRMS]; Chlorophyta [WoRMS]; Cladophora Kützing, 1843 [WoRMS]; Rhizoclonium Kützing, 1843 [WoRMS]
    Marine/Coastal
Author keywords
    Chaetomorpha; Cladophora; green algae; molecular phylogenetics;polyphyly; rDNA; Rhizoclonium; taxonomy
Authors  Top 
  • Boedeker, C.
  • Leliaert, F., more
  • Zuccarello, G.C.
Abstract
    The taxonomy of the Cladophoraceae, a large family of filamentous green algae, has been problematic for a long time due to morphological simplicity, parallel evolution, phenotypic plasticity, and unknown distribution ranges. Partial large subunit (LSU) rDNA sequences were generated for 362 isolates, and the analyses of a concatenated dataset consisting of unique LSU and small subunit (SSU) rDNA sequences of 95 specimens greatly clarified the phylogeny of the Cladophoraceae. The phylogenetic reconstructions showed that the three currently accepted genera Chaetomorpha, Cladophora, and Rhizoclonium are polyphyletic. The backbone of the phylogeny is robust and the relationships of the main lineages were inferred with high support, only the phylogenetic position of both Chaetomorpha melagonium and Cladophora rupestris could not be inferred unambiguously. There have been at least three independent switches between branched and unbranched morphologies within the Cladophoraceae. Freshwater environments have been colonized twice independently, namely by the freshwater Cladophora species as well as by several lineages of the Rhizoclonium riparium clade. In an effort to establish monophyletic genera, the genera Acrocladus and Willeella are resurrected and two new genera are described: Pseudorhizoclonium and Lurbica.
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