Pleurosigma 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 Pleurosigma attenuatum var. attenuatum Pleurosigma attenuatum f. attenuatum