Gyrosigma attenuatum Kützing Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Pleurosigmataceae genus Gyrosigma species Gyrosigma attenuatum Name Homonyms Gyrosigma attenuatum (Kützing) Rabenhorst, 1853 Gyrosigma attenuatum Kützing