Sargassum duplicatum J.Ag. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Fucales family Sargassaceae genus Sargassum species Sargassum duplicatum Name Homonyms Sargassum duplicatum Bory, 1828 Sargassum duplicatum J.Ag.