Staurastrum asperum Breb., 1848 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum asperum Name Synonyms Cosmoastrum asperum (Bréb.) Pal.-Mordv., 1982 Homonyms Staurastrum asperum Ralfs Staurastrum asperum Breb., 1848