Ectocarpus confervoides var. brumalis Holden Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Ectocarpales family Ectocarpaceae genus Ectocarpus species Ectocarpus siliculosus Name Homonyms Ectocarpus confervoides var. brumalis Holden