Cosmarium quadratum var. willei (Schmidle) Willi Krieg. & Gerloff Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium quadratum Name Synonyms Cosmarium quadratum f. maius Manguin Cosmarium quadratum f. willei West & G.S.West, 1908 Dysphinctium quadratum var. willei Schmidle, 1893 Homonyms Cosmarium quadratum f. willei West & G.S.West, 1908 Cosmarium quadratum var. willei (Schmidle) Willi Krieg. & Gerloff