Staurastrum disputatum var. extensum (Borge) West & G.S.West, 1912 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum disputatum Name Synonyms Staurastrum dilatatum var. extensum Borge, 1906 Homonyms Staurastrum disputatum var. extensum (Borge) West & G.S.West, 1912