Denticula tenuis var. frigida (Kütz.) Grunow Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Bacillariales family Bacillariaceae genus Denticula species Denticula tenuis Name Homonyms Denticula tenuis var. frigida (Kützing) Grunow, 1881