Closterium tenerrimum Kütz. ex Ralfs, 1848 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Closteriaceae genus Closterium species Closterium acutum Name Homonyms Closterium tenerrimum Kütz. ex Ralfs, 1848 Closterium tenerrimum Kütz.