Gyrosigma macrum (W.Sm.) J.W.Griff. & Henfr. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Pleurosigmataceae genus Gyrosigma species Gyrosigma macrum Name Homonyms Gyrosigma macrum (W.Smith) J.W.Griffith & Henfrey, 1856