AlgaeBase Taxonomic Thesaurus
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  Chromista
      Heterokontophyta
            Phaeophyceae
                    Sphacelariales
                            Sphacelodermaceae
                                     Sphaceloderma
                                             Sphaceloderma caespitulum
                                                   [Sphacelaria caespitula]
                                                   [Sphaceloderma helgolandicum]