Central Taxonomic Thesaurus
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  Chromista
      Ciliophora
            Gymnostomatea
                    Spathidiida
                            Spathidiidae
    Harosa
      Heterokontophyta
            Chrysophyceae
                    Hydrurales
                            Hydruraceae
            Xanthophyceae
                    Mischococcales
                            Characiopsidaceae
                            Ophiocytiaceae
                            Oscillatoriaceae
                    Tribonematales
                            Tribonemataceae
                    Vaucheriales
                            Vaucheriaceae
      Ochrophyta
        Phaeista
            Phaeophyceae
                    Ectocarpales
                            Ectocarpaceae
                            Scytosiphonaceae
                    Fucales
                            Fucaceae
                            Sargassaceae
                    Laminariales
                            Laminariaceae
                            Lessoniaceae