Gyrosigma normanii (Ralfs) Mann, 1907 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Pleurosigmataceae genus Pleurosigma species Pleurosigma normanii Name Homonyms Gyrosigma normanii (Ralfs) Mann, 1907