Staurastrum margaritaceum var. trigonum Manguin, 1939 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. trigonum Manguin, 1939