Cystophora retroflexa (Labill.) J.Agardh Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Fucales family Sargassaceae genus Cystophora species Cystophora retroflexa Name Homonyms Cystophora retroflexa (Labill.) J.Agardh