Staurastrum ralfsii (West & G.S.West) Coesel & Meesters, 2013 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum ralfsii Name Synonyms Cosmoastrum orbiculare var. ralfsii (West & G.S.West) Pal.-Mordv., 1982 Homonyms Staurastrum ralfsii (West & G.S.West) Coesel & Meesters, 2013