Sargassum myriocystum subsp. horridula Grunow Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Fucales family Sargassaceae genus Sargassum species Sargassum polycystum Name Homonyms Sargassum myriocystum var. horridula Grunow Sargassum myriocystum f. horridula Grunow Sargassum myriocystum subsp. horridula Grunow