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Eukaryota
  Plantae
    Embryophyta
      Magnoliophyta
            Unclassified Angiosperms
                    Ceratophyllales
                            Ceratophyllaceae
                                     Ceratophyllum
                                             Ceratophyllum demersum
                                               Ceratophyllum demersum var. demersum
                                                     [Ceratophyllum demersum var. demersum f. demersum]
                                             Ceratophyllum muricatum
                                               Ceratophyllum muricatum subsp. muricatum
                                                     [Ceratophyllum submersum subsp. muricatum var. echinatum]
                                                     [Ceratophyllum submersum subsp. muricatum]
                                             Ceratophyllum submersum
                                               Ceratophyllum submersum subsp. submersum
                                               Ceratophyllum submersum subsp. submersum var. submersum