AlgaeBase Taxonomic Thesaurus
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  Chromista
                            Alisphaeraceae
                                     Alisphaera
                                             Alisphaera capulata
                                             Alisphaera extenta
                                             Alisphaera gaudii
                                             Alisphaera ordinata
                                                   [Acanthoica ordinata]
                                             Alisphaera pinnigera
                                             Alisphaera quadrilatera
                                             Alisphaera spatula
                                             Alisphaera uncinata
                                             Alisphaera unicornis
                                     Canistrolithus
                                             Canistrolithus valliformis
                                     Polycrater
                                             Polycrater galapagensis