Ceramium gracillimum subsp. byssoideum Mazoyer, 1938 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Ceramiaceae genus Gayliella species Gayliella flaccida Name Homonyms Ceramium gracillimum var. byssoideum Ceramium gracillimum subsp. byssoideum Mazoyer, 1938