Ceramium rubrum var. tenue C.Agardh, 1824 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Ceramiaceae genus Ceramium species Ceramium virgatum Name Homonyms Ceramium rubrum f. tenue J.Agardh, 1876 Ceramium rubrum var. tenue C.Agardh, 1824