Closterium acerosum (Schrank) Ehrenb. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Closteriaceae genus Closterium species Closterium acerosum Name Homonyms Closterium acerosum (Schrank) Ehrenb. Closterium acerosum (Schrank) Ehrenb. ex Ralfs, 1848