Cosmarium margaritatum var. sublatum (Nordst.) Krieger, 1932 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium quadrum Name Homonyms Cosmarium margaritatum var. sublatum (Nordst.) Krieger, 1932