Nitzschia gracilis f. acicularoides Hantzsch Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Bacillariales family Bacillariaceae genus Nitzschia species Nitzschia gracilis Name Homonyms Nitzschia gracilis f. acicularoides Coste & Ricard, 1980