Cosmarium impressulum var. suborthogonum (Racib.) W. & G.S.West Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium impressulum Name Homonyms Cosmarium impressulum f. suborthogonum (Racib.) West & G.S.West, 1908 Cosmarium impressulum var. suborthogonum (Racib.) Taft, 1945 Cosmarium impressulum var. suborthogonum (Racib.) W. & G.S.West