Gomphonema angustatum var. angustatum Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Cymbellales family Gomphonemataceae genus Gomphonema species Gomphonema angustatum Name Homonyms Gomphonema angustatum subsp. angustatum Gomphonema angustatum var. angustatum Gomphonema angustatum f. angustatum