Fucus elongatus Gunnerus, 1772 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Gigartinales family Cystocloniaceae genus Cystoclonium species Cystoclonium purpureum Name Homonyms Fucus elongatus Gunnerus, 1772 Fucus elongatus L.