Gyrosigma attenuatum var. attenuatum Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Pleurosigmataceae genus Gyrosigma species Gyrosigma attenuatum Name Homonyms Gyrosigma attenuatum var. attenuatum Gyrosigma attenuatum f. attenuatum