Staurastrum margaritaceum var. robustum W. & G.S.West Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum margaritaceum Name Homonyms Staurastrum margaritaceum var. robustum W. & G.S.West