Staurastrum curvatum var. elongatum G.M.Smith, 1924 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurodesmus species Staurodesmus cuspidicurvatus Name Homonyms Staurastrum curvatum var. elongatum G.M.Smith, 1924