Staurastrum cyrtocerum Ralfs Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Desmidiaceae genus Staurastrum species Staurastrum cyrtocerum Name Homonyms Staurastrum cyrtocerum Bréb. Staurastrum cyrtocerum Ralfs