Staurastrum pentacerum var. hexacerum T.J.C.Irénée-Marie, 1957 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum pentacerum Name Homonyms Staurastrum pentacerum var. hexacerum T.J.C.Irénée-Marie, 1957