Ceramium pennatum Roth, 1806 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Pterosiphonia species Pterosiphonia pennata Name Homonyms Ceramium pennatum Hornem., 1813 Ceramium pennatum J.Agardh, 1851 Ceramium pennatum Roth, 1806