Eunotia arcubus var. bidens (Grunow) Lange-Bert., 2011 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Eunotiales family Eunotiaceae genus Eunotia species Eunotia arcus Name Homonyms Eunotia arcubus var. bidens (Grunow) Lange-Bert., 2011