Navicula contenta var. biceps Arnott Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Diadesmidaceae genus Humidophila species Humidophila contenta Name Homonyms Navicula contenta var. biceps Arnott Navicula contenta var. biceps (Grunow) Cleve, 1894 Navicula contenta var. biceps (Grunow) Van Heurck, 1885 Navicula contenta f. biceps (Arnott Ms. & Grunow) Hustedt, 1930