Staurastrum sexcostatum Brebisson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum sexcostatum Name Homonyms Staurastrum sexcostatum Brebisson Staurastrum sexcostatum Bréb. ex Ralfs