Synedra affinis var. obtusa Arnott Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Fragilariales family Fragilariaceae genus Synedra species Synedra affinis Name Homonyms Synedra affinis var. obtusa Hustedt, 1914 Synedra affinis f. obtusa Arnott Synedra affinis f. obtusa Arnott ex Van Heurck, 1881 Synedra affinis var. obtusa Arnott Synedra affinis var. obtusa Arnott Ex Van Heurck, 1881