Gyrosigma hippocampus Smith 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 hippocampus (Ehrenberg) Hassall, 1845 Gyrosigma hippocampus Smith