Eunotia robusta var. diadema (Ehr.) Ralfs Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Eunotiales family Eunotiaceae genus Eunotia species Eunotia serra Name Homonyms Eunotia robusta var. diadema (Ehrenberg) Carruthers, 1864 Eunotia robusta var. diadema (Ehrenb.) Ralfs, 1861