Closterium venus Kuetz. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Closteriaceae genus Closterium species Closterium venus Name Synonyms Closterium venus subsp. venus Homonyms Closterium venus Kütz. ex Ralfs Closterium venus Kuetz.