Ceramium pennatum Hornem., 1813 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Sphacelariales family Sphacelariaceae genus Chaetopteris species Chaetopteris plumosa Name Homonyms Ceramium pennatum Hornem., 1813 Ceramium pennatum J.Agardh, 1851 Ceramium pennatum Roth, 1806