Nitzschia obtusa var. kurzii Rabenhorst Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Bacillariales family Bacillariaceae genus Nitzschia species Nitzschia obtusa Name Homonyms Nitzschia obtusa var. kurzii Rabenhorst ex Cleve & Möller Nitzschia obtusa var. kurzii Rabenhorst Nitzschia obtusa var. kurzii (Rabenh.) Grunow, 1880