Cosmarium cylindricum Ralfs Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium cylindricum Name Synonyms Calocylindrus cylindricus (Ralfs) Cooke, 1887 Dysphinctium ralfsii (Kutzing) Hansg. Homonyms Cosmarium cylindricum Ralfs