Cosmarium subcontractum W. & G.S.West Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium subcontractum Name Synonyms Cosmarium capitulum var. detritum Playfair, 1913 Cosmarium subcontractum var. subcontractum Homonyms Cosmarium subcontractum W. & G.S.West