AlgaeBase Taxonomic Thesaurus
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  Chromista
      Heterokontophyta
            Fragilariophyceae
                    Protoraphidales
                            Protoraphidaceae
                                     Protoraphis
                                             Protoraphis atlantica
                                             Protoraphis hustedtiana
                                     Pseudohimantidium
                                             Pseudohimantidium pacificum
                                                   [Hormophora zavodnikia]