Hecatonema globosum var. nana A.D.Cotton Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Ectocarpales family Chordariaceae genus Microspongium species Microspongium globosum Name Homonyms Hecatonema globosum var. nana A.D.Cotton