Cosmarium hammeri var. homaloderrnum (Nordst.) W. & G.S.West Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium hammeri Name Synonyms Cosmarium homalodermum Nordst., 1875 Homonyms Cosmarium hammeri var. homaloderrnum (Nordst.) W. & G.S.West