Cosmarium margaritiferum f. margaritiferum Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium margaritiferum Name Homonyms Cosmarium margaritiferum f. margaritiferum Cosmarium margaritiferum var. margaritiferum